0% found this document useful (0 votes)
259 views41 pagesJis A6921-2014
Uploaded by
Hương ĐàoCopyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF or read online on Scribd
0% found this document useful (0 votes)
259 views41 pagesJis A6921-2014
Uploaded by
Hương ĐàoCopyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF or read online on Scribd
/ 41
INDUSTRIAL
STANDARD
Translated and Published by
Japanese Standards Association
JIS A 6921:
(WACOA/JSA)
Wallpaper and wallcoverings for decora-
tive finish
ICS 85.080 : 91.060 : 91.180
Reference number : JIS A 6921 : 2014 (E)
PROTECTED BY,COR3 eras 2S A6921: 2014
Date of Establishment: 1976-04-01
Date of Revision: 2014-07-22
Date of Public Notice in Official Gazette: 2014-07-22
Investigated by: Japanese Industrial Standards Committee
Standards Board
Technical Committee on Architecture
JIS A 6921 : 2014, First English edition published in 2015-08
‘Translated and published by: Japanese Standards Association
Mita MT Building, 3-13-12, Mita, Minato-ku, Tokyo, 108-0073 JAPAN
In the event of any doubts arising as to the contents,
the original JIS is to be the final authority.
© 8A 2015
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized
in any form or by any means, elctronic or mechanical, including photocopying and microfilm, without
permission in writing from the publisher.
Printed in Japan NHUHIN
roomier, PROTECTED BY;CORSRUGHIan or simossoosrousr=n Introduction -
3.2
A6921: 2014
Contents
Scope ~
Normative references “+++
Quality
Appearance ~
Performance
Dimensions «
Effective width
Effective length
Materials ~~
‘Tests
General conditions of test ~
Sampling method -
‘Test methods
Inspection oo - oo sesso sosseeeeeened
Marking es seen seseeeeneee]
Attached document «+
Annex A (informative) Emission test chamber method — Determination of
the emission of volatile organic compounds (VOC)
and aldehydes for wallpaper and walleoverings ~~
Annex B (informative) Calculation of incremental value of air concentration
im indoor space model +++--+-+++++++------++
Annex C (informative) Comparison table between previous and current
editions of this Standard on technically significant
revisions ---------- eeree : LY
@
PROTECTED BY,CORSBEGEHTou,orsiiosoasrensir: A692
2014
Foreword
This translation has been made based on the original Japanese Industrial
Standard revised by the Minister of Economy, Trade and Industry,
through deliberations at the Japanese Industrial Standards Committee
as the result of proposal for revision of Japanese Industrial Standard
submitted by Wallcoverings Association of Japan (WACOA) Japanese
Standards Association (JSA) with the draft being attached, based on the
provision of Article 12 Clause 1 of the Industrial Standardization Law
applicable to the case of revision by the provision of Article 14.
Consequently JIS A 6921: 2003 is replaced with this Standard.
However, JIS A 6921: 2003 may be applied in the JIS mark certification
based on the relevant provisions of Article 19 Clause 1, ete. of the Indus-
trial Standardization Law until July 21, 2015.
This JIS document is protected by the Copyright Law.
Attention is drawn to the possibility that some parts of this Standard
may conflict with patent rights, applications for a patent after opening to
the public or utility model rights. The relevant Minister and the Japanese
Industrial Standards Committee are not responsible for identifying any of
such patent rights, applications for a patent after opening to the public or
utility model rights.
Gi)
PROTECTED BYCORKREGHSu or taoscozsrewsren JAPANESE INDUSTRIAL STANDARD, JIS A 6921 : 2014
Wallpaper and wallcoverings for decorative finish
Introduction
‘This Japanese Industrial Standard was established in 1976 and has gone through
five revisions to this day. The last revision was made in 2003, and it has been revised
this time for the purpose of alteration of the technical matters such as testing method.
‘The corresponding International Standard has not been established at this point.
‘The comparison table between previous and current editions of this Standard on tech”
nically significant revisions is given in Annex C.
1 Scope
This Standard specifies the wallpaper and walleoverings to be stuck mainly on the
wall, ceiling, ete. of the building as interior finish.
The wallpaper and walleoverings defined herein mean the wallcovering product of
paper, fibre, inorganic material (including metallic foil), plastics (polyvinyl chloride
resin, ethylene vinyl acetate copolymer resin, acrylic resin, etc.) and their combination.
Moreover, this Standard is applicable to materials coated previously with adhesives,
pressure sensitive adhesives, etc.
2 Normative references
The following standards contain provisions which, through reference in this text,
constitute provisions of this Standard. The most recent editions of the standards (in-
cluding amendments) indicated below shall be applied.
JIS A 6922 Adhesives for wallpaper and wallcoverings for decorative finish and
TATEGU
JIS K 7362 Plastics — Determination of changes in colour and variations in
properties after exposure to daylight under glass, natural weathering
or laboratory light sources
JIS K 8001 General rule for test methods of reagents
JIS L.0805 Grey seale for assessing staining
JIS L.0842 Test methods for colour fastness to enclosed carbon are lamp light
JIS L.0849 Test methods for colour fastness to rubbing
JISP 8113 Paper and board — Determination of tensile properties — Part 2:
Constant rate of elongation method
JIS R 3503 Glass apparatus for chemical analysis
JIS Z8401 Guide to the rounding of numbers
seme seent te, PROTECTED BX,CORSBUGHIan or simosoosrousn=n 2
A921: 2014
JIS Z 8703
JIS Z 8721
JIS Z 8722
‘Standard atmospheric conditions for testing
Colour specification —
Methods of colour measurement — Reflecting and transmitting objects
Japanese Agricultural Standard (JAS) Plywood
3 Quality
3.1 Appearance
The wallpaper and wallcoverings shall be free from external irregular colour, flaw,
wrinkle, bubble,
ingress of foreign matters, bowing, pattern discrepancy and the like
which will affect the practicality of use. However, those especially given for the purpose
of decoration are excluded.
3.2 Performance
‘The wallpaper and walleoverings shall meet the requirements in Table 1 when tested
in accordance with clause 6.
Table 1 Quality
bing (grade) | Colour fastness [Length [4 min.
towet rubbing [Width {|__|
Tem’ Performance ] Subclause to
be applied
(Colour fastness to light” (grade) tin. 63.1
Colour fast- | Colour fastness [Length [4 min, 6.3.2
ness to rub- | todry rubbing [Width
Notes ®
Hiding property (grade) 3 min.
Workability ‘No float and peeling
Wet strength N/I.5 em Length | 5.0 min.
Width.
Formaldehyde emission quantity mg/L. [0.2 max. 636
NOTE: The longitudinal direction and the lateral direction of product are
dofined as the longth and the width.
For the colour fastness to light and the colour fastness to rubbing,
the test condition I-, I or II in Table 3 shall be selected according to
the characteristics of the material.
When the formaldehyde emission quantity is not more than
0.2 mgIL, its grade shall be grade Fv sss and its symbol shall be
Freseser
4 Dimensions
4.1 Effective width
‘The width of wallpaper and walleoverings shall be indicated by the effective width ?.
‘The effective width shall be 520 mm, 920 mm and 460 mm in principle.
PROTECTED BYCORSREGHShi orstaossozirewsren
Specification according to their three attributes 3
A6921: 2014
Note The effective width is defined as the width taken into account for exe
cuting works. Where the pattern match is necessary, it means the effec”
tive width in the case of executing pattern matching.
42 Effective length
‘The length of wallpaper and wall coverings shalll be indicated by the effective length?
Note® The effective length is defined as the length taken into account for exe-
cuting works.
5 Materials
When the wallpaper and walleoverings are manufactured, materials shalll be selected
in consideration of the characteristics of product, the time of using and waste disposal.
6 Tests
6.1 General conditions of test
Unless especially specified, the tests shall be carried out at the ordinary temperature
and ordinary humidity conditions [at the temperature of 20 °C * 15 °C and the relative
humidity of (65 + 20) %] specified in JIS Z 8703.
6.2 Sampling method
‘Take the test specimens having the sizes given in Table 2 (see Figure 1). Where the
hue, the material compositions, etc. are different according to the parts of product, take
the test specimen from each part.
Table 2 Size and number of test specimens
‘Symbol ] Size of test
Test item oftest | specimen | Number oftest
, specimens
specimen| em
‘Test for colour fastness to light A 65x12, 2
Test for col’ [Colour [Length | Br 3x22 3
our fastness | fastness [Width | Bi 3 x22 3
torubbing | to dry
rubbing
Colour [Length [Br 3 x22 3
fastness [Width | Br 3 x22 3
to wet
rubbing
Hiding property test Cc [20x20 2
Workability test Length, 20x50 2
2050 2
Wet strength test
1.5% 20 10 min.»
Formaldehyde emission quantity
test Fe [15x40 2
Note ® The test specimens shall be taken in accordance with clause 6 of JIS
P8113.
seme seent te, PROTECTED BX,CORSBUGHSan or simosoosrousn=n 4
A 6921: 2014
Longitudinal direction
Figure 1 Example of sampling position and symbols (informative)
6.3. Test methods
6.3.1 Test for colour fastness to light
For the test for colour fastness to light, use the testing machine specified in JIS L
0842 and mount the test specimen according to the operations specified in 7.1, a) and
b) of JIS L 0842. After irradiating the surface under the conditions specified in 7.1 d)
and 8 b) of JIS L 0842 for the time specified in Table 3, take out the test specimen and
allow to stand at a cool and dark place for at least 2 h. Evaluate the colour fastness in
accordance with 4.1.4.2 or 4.1.4.3 of JIS K 7362.
6.3.2. Test for colour fastness to rubbing
For the test for colour fastness to rubbing, use the Type II rubbing tester (Gakushin
type) specified in JIS L 0849, and carry out the operations specified in 9.2 a) and 9.2 b)
‘The number of frictions shall be that specified in Table 3. By reference to clause 10 of
JIS L 0849, evaluate in accordance with Table 4 using the grey scale for assessing
staining specified in JIS L 0805.
For “wallpaper and wallcoverings coated previously with adhesives, pressure sensi-
tive adhesives, ete.”, peel off the release paper and stick it on the test board of friction
testing machine so as not to be aerated.
“ PROTECTED BYCORKREGHSu or taoscozsrewsren 5
A921: 2014
Table 3 Test conditions
Trem ‘Test conditions Grradiation time or number of rubbing)
a
Paper, fibre and inorganic material Plastics
‘Test for colour fastness to 40h
light
Dry Length | Reeiprocation | Reciprocation | Reciprocation
rubbing 12 times 25 times 50 times
Width | Reciprocation Reciprocation | Reciprocation
12 times 25 times 50 times
Wet Length | Reeiprocation | Reciprocation | Reciprocation
rubbing 3 times 5 times 25 times
test [Width | Reciprocation | Reciprocation | Reciprocation
3 times 5 times 25 times
Note T— or I shall be selected according to the characteristics of wallpaper and
walleovering
Table 4 Criteria of colour fastness to rubbing
Grade Criteria NBS unit of
colour difference
Grade 1 [Change in colour corresponding to grey scale for as| 32.0230
sessing staining rating 1 or that exceeding this degree.
Grade 2 [Change in colour corresponding to grey scale for as | 160216
sessing staining rating 2 or the equivalent.
Grade 3 [Change in colour corresponding to grey scale for as | 8.00.7
sessing staining rating 3 or the equivalent.
Grade 4 [Change in colour corresponding to grey scale for as | 40203
‘sossing staining rating 4 or the equivalent.
Grade 6 [Change in colour corresponding to grey scale for as] 0.2 max.
sessing staining rating 5 or the equivalent,
6.3.3 Hiding property test
For the hiding property test, contact the grey scale for hiding property test closely
with the back surface of test specimen, move this grey scale to the right and left or
back and forth, and carry out assessment of the degree to which it can been seen
through the test specimen according to Table 5.
‘The grey seale for hiding property test consists of two kinds of achromatic colour
chips on a board alternately, and the shape and dimensions shall be in accordance with
Figure 2. The colour chip “a” in Figure 2 shall be of achromatic colour having a light-
ness of 9.4 + 0.1, and the colour chip “b” shall be of the achromatic colour having a
lightness of 8.8 + 0.1. Further, the paper of the colour chip and its paint shall be free
from fluorescence and have little aging, and its surface shall be uniform and nearly
dull. The lightness of the colour chip is determined from Attached Table 2 in JIS Z
8721 using the values of the chromaticity coordinates x, y and z obtained by the method
specified in JIS Z 8722. The colour chip made of plastic film or the like may be used.
seme seent te, PROTECTED BX,CORSBUGHSan or simosoosrousn=n 6
A 6921: 2014
The test place shall be provided with at least 540 Ix of illumination that corresponds
to the daylight from the north-facing window avoiding direct sunlight. For “wallpaper
and wallcoverings coated previously with adhesives, pressure sensitive adhesives”, af
ter peeling off the release paper, stick it on the film with the physical properties of not
more than 100 um in thickness and not more than 10 % in haze [turbidity (cloudiness)]
(see JIS K 7136) so as not to be aerated, take it as a test specimen and assess it.
Table 5 Criteria of hiding property
Hiding Criteria
property
Grade 1_| Clearly visible
Grade 2 [Visible
Grade 3 [Rarely visible
Grade 4 [Invisible
Unit: mm
«|
sls
3/3
e] 8
és
Figure 2. Grey scale for hiding property
6.3.4 Workability test
For the workability test, apply approximately 20 g of the adhesive of Type 2 Class 1
or Type 2 Class 2 specified in JIS A 6922, or that prepared by mixing at a rate of 80 %
starch and 20 % vinyl acetate emulsion and adding water of 30 % of the mass to adjust
the viscosity on the test specimen uniformly, and after allowing to stand for about 5
min, stick the test specimen to the test board as shown in Figure 3. Materials of the
test board shall be any of lauan, magnolia obovata and cercidiphyllum japonicum, their
parquet or plywood. In the case of plywood, plywood for general use specified in the
Japanese Agricultural Standard (JAS) and free from knot, crack, gap and flaw shall be
used. The moisture content shall be not more than 15 %. Observe the adhesion condi~
tion between the test specimen and the test board checking points A, B and C in Figure
8, 24 h after sticking.
For “wallpaper and walleoverings coated previously with adhesives, pressure sensi-
tive adhesives’, stick the test specimen to the test board in accordance with each usage
and observe the adhesion condition according to the above-mentioned procedure with
out using the above-mentioned adhesive.
seme seent i, PROTECTED BYGORSREGHS2u/orsipmocsronczrn AG921 : 2014
Unit! mm
20 to 2
‘Test specis
to 50
Figure 3 Test board
6.3.5 Wet strength test
For the wet strength test, after immersing the test specimens into water for 5 min,
take them out, place them on three sheets of blotting paper® laid one on top of another,
cover them with a sheet of blotting paper, press them softly to remove the excessive
moisture and carry out a tensile test quickly
‘The pressurization at the time of removing the moisture shall be such extent that a
small amount of adhered water is visible on the surface of the test specimen to avoid
dispersion of test results,
For the tensile test in this case, use the testing machine specified in clause 6 of JIS P
8113, measure at least 10 test specimens in accordance with cause 9 of JIS P 8113 and
obtain each average value of the length and width. Set the tensile speed at 20 mm +5
mm/min.
For “wallpaper and wallcoverings coated previously with adhesives, pressure sensi-
tive adhesives”, after immersing the test specimens whose release papers have been
peeled away in water for 5 min, take them out and place them on the release papers
facing the surface to which adhesive or pressure sensitive adhesive is applied. Cover
them with three sheets of blotting paper, press them softly to remove the excessive
moisture contained between the release paper and the wallpaper and walleoverings,
peel them off from the release paper y out the tensile test quickly.
and car
Note® The blotting paper with a grammage of 250 g/m? + 25 g/m? specified in
6.4 of JIS P 8222 or that at least equivalent thereto should be used.
6.3.6 Formaldehyde emission quantity test
‘The formaldehyde emission quantity test by desiccator method shall be carried out
by using the glass desiccator shown in Figure 4. Pour distilled water into the desiccator,
place the test specimens specified in Table 2, and obtain the emission quantity of for-
maldehyde from the concentration of formaldehyde absorbed in the distilled water af-
ter 24 h under the condition of 23 °C + 1 °C. For “wallpaper and walleoverings coated
previously with adhesives, pressure sensitive adhesives”, peel away the release paper
and carry out the test. The principle of concentration measurement of formaldehyde
we PROTECTED BXCORSREGTau/orstmosooonaraw1 8
A921: 2014
absorbed in distilled water is based on Hantzsch reaction in which formaldehyde reacts
with ammonium ion and acetylacetone to produce diacetyldihydrolutidine (DDL).
The storage of test specimens and collection of formaldehyde shall be as follows.
a) Storage of test specimen The test specimens shall be covered with polyethylene
bag immediately after manufacturing, and stored at the ordinary temperature
(20 °C + 15 °C) until the testing time. However, the limit of storage period shall be
four weeks.
b) Collection of formaldehyde Place the glass crystallizing dish of 12 em in diameter
and 6 em in height containing 300 ml of distilled water at the bottom part of the
desiccator with the nominal size of 240 mm specified in JIS R 3503, lay a sheet of
wire mesh on it, put the specified number of test specimens as shown in Figure 4,
allow to stand under the condition of 23 °C # 1°C for 24 h and let the distilled wa-
ter absorb formaldehyde to prepare the sample solution,
NOTE: It is recommended that the test specimens (F; and F:) be rolled up in
shape of cylinder and supported by the suitable metal fittings.
Glass cover
Test specimen
Dessicator Wire mesh
Crystallizing dish
Front view Distilled water
Fi
Fe
Plan of test specimen
Figure 4 Collection method of formaldehyde
a) Determination method of formaldehyde The concentration of formaldehyde in the
sample solution shall be determined by acetylacetone method using photoelectric
spectrophotometer.
1) Acetyl acetone-ammonium acetate solution Dissolve 150 g of ammonium acetate
in 800 ml of distilled water, add 3 ml of glacial acetic acid and 2 ml of acety-
lacetone to this solution. After shaking thoroughly, add the distilled water to
make the solution 1 L and store it in the brown bottle. All the reagents used for
the test shall be of guaranteed grade.
2) Determination procedure Pour 25 ml of the sample solution into 100-ml Erlen-
meyer flask with ground stopper, and add 25 ml of acetylacetone-ammonium ace~
seme seent te, PROTECTED BYGORSREGHS2u/orsipmocsronczrn 3)
3.)
3.2)
9
A6921: 2014
tate solution (within several days after preparation) to this and shake thoroughly.
After putting the stopper, warm this flask in the hot water bath at a temperature
of 65 °C +2°C for 10 min. In parallel with this procedure, use the distilled water
in place of the sample solution and perform the similar procedure to make the
reference solution. After cooling the solution to be tested and the reference solu-
tion to room temperature, transfer these into the absorption cell. Adjust the ab-
sorbance to 0 using the reference solution at the wavelength near 412 nm. Meas-
ure the absorbance of the solution to be tested and obtain the concentration
(mg/L) of formaldehyde from the working curve prepared previously.
NOTE: When the maximum absorbance appears at other wavelength than
412 nm, all measurement including the preparation of working
curve may be carried out at this wavelength.
Preparation of working curve
‘The formaldehyde standard stock solution and its verification Dilute 1 ml of
formaldehyde solution (36.0 % to 38.0 % formaldehyde) with distilled water to
make 1 L of the standard stock solution and verify according to the following
method.
Take 5 ml of the standard stock solution into 50-ml to 100-ml Erlenmeyer
flask with ground stopper, add 20 ml of 0.01 mol/L iodine solution and 1 ml of 5
mol/L potassium hydroxide solution and put the stopper, and allow to stand at
ordinary temperature for 15 min. In parallel with this, operate using 5 ml of
distilled water similarly as a blank test. Add 2 ml of 2.5 moV/L sulphuric acid
little by little, put the stopper, allow to stand at ordinary temperature for 5 min,
and titrate by 0.01 mol/L sodium thiosulfate solution by using the microburette.
Obtain the quantity of formaldehyde in 1 ml of the standard stock solution act
cording to formula (1).
0.150 1x(B~S)xf
5
where, C + quantity of formaldehyde (mg/m)
B : quantity of titration of blank (ml)
S : quantity of titration of the formaldehyde standard stock solu
tion (mD
J + factor of sodium thiosulfate solution
The 0.01 moV/L sodium thiosulfate solution shall be in accordance with JA.5.2
t) 3) of JIS K 8001.
Preparation of working curve Take the calculated quantity of the standard
stock solution verified in 3.1) into a volumetric flask, dilute with distilled water
80 that 0.1 mg of formaldehyde is contained in 1 ml of this solution. Take 0.5 ml,
1.0 ml and 1.5 ml of the same solution, dilute them with distilled water respec
tively to make 50 ml and take them as the standard solutions.
‘Take 25 ml of these solutions into 100ml Erlenmeyer flask with ground
stopper respectively, add 25 ml of acetylacetone-ammonium acetate solution to
c »
PROTECTED BY,CORSREGEHToy,orsioso2srensirn: 10
A921: 2014
these and measure the absorbance by the method described in 6.3.6 ¢). Plot the
relation between the obtained absorbance and the concentration of formalde-
hyde, and obtain the slope of this relation by the graph or calculation.
3.3) Calculation Calculate the concentration of formaldehyde in the test specimen
absorbed in distilled water in side the desiccator according to formula (2).
G=F x (Ad~Ab)
(2)
where, G+ concentration of formaldehyde in test specimen (mg/L)
Ad : absorbance of the solution in desiccator containing test speci-
Ab + absorbance of formaldehyde in background
F slope of working curve on the formaldehyde standard solution
(mg/l)
‘The concentration of formaldehyde shall be rounded off to two decimal places
according to JIS Z 8401.
‘The emission test chamber method is described in Annex A as reference.
7
Inspection
‘The inspection shall be carried out by a reasonable sampling method and the test
specimens shall be accepted when they satisfy the requirements in clauses 3 to 5.
However, the performance test in clause 8 shall be carried out in case of any changes in
technical conditions for manufacturing which might influence the performance.
8
Marking
‘The products which have met all of the requirements in this Standard shall be
marked with the following information on the readily visible part of the package for
each roll.
a)
»)
°
a)
e)
Dimensions (effective width and effective length)
‘Lot number, or month and year of manufacture
‘Name of manufacturer or its abbreviation
Formaldehyde emission quantity The symbol of grade (Fv:
marked.
Colour fastness to light/colour fastne:
lected shall be indicated.
vy) shall be
to rubbing I-, I or II of test condition se-
Example : Colour fastness to light/Colour fastness to rubbing I
Material The materials shall be mentioned from the higher content rate of mate~
rial indicated in the scope in order.
Moreover, plastics shall be marked with the name of resin (except for printing
ink and surface treatment agent). For “wallpaper and walleoverings coated previ-
ously with adhesives, pressure sensitive adhesives, ete.”, the fact shall be clearly
described.
PROTECTED BYCORSREGHSan or taoscozsrewsren ul
A6921: 2014
Example 1 Polyvinylehloride resin/Fibre/Paper
Example 2 Inorganic material/Acrylic resin (adhesive)/Paper
9 Attached document
When the test condition I~ is selected, the following precautions shall be attached.
a) Precautions for handling in consideration of the inferiority of colour fastness to
light and colour fastness to rubbing
b) Precautions for transportation and storage
©) Other necessary precautions
roomier, PROTECTED BX,CORSBUGHSan or simosoosrousn=n 12
A921: 2014
Annex A (informative)
Emission test chamber method — Determination of the
emission of volatile organic compounds (VOC) and alde-
hydes for wallpaper and wallcoverings
Al General
‘This Annex prepared based on the Wallcoverings Material Association Standard
(Emission test chamber method : 2000) describes the testing method for the determi-
nation of area specific emission factor of the volatile organic compounds (VOC) and al-
dehydes emitted from the building products used for interior under the specific envi-
ronmental condition by using emission test chamber.
This emission test chamber method described in this Annex is applicable to the
roll-shaped products and board-shaped products such as wallpaper and walleoverings
to be used for the interior of building, and the adhesives to be used for their sticking.
A2 Terms and definitions, symbols and units
A.2.1 Terms and definitions
A.2.1.1 air exchange rate
ratio of the volume of clean air brought into the emission test chamber per hour (ven
tilation rate) and the free emission test chamber volume measured in identical units
A212 ventilation rate
air volume entering into the emission test chamber per time
2.1.3 area specific ventilation rate
ratio between the supply ventilation rate and the area of the test specimen
A.2.1.4 nominal time constant
reciprocal of air exchange rate
A215 local age of air
time required for the movement of air from the air inlet to an arbitrary point in the
test chamber
A.2.1.6 the mean age
mean of the local age of air at all points in the test chamber
A.2.1.7 coefficient of air change performance
ratio of the nominal time constant to the mean age
A.2.1.8 air velocity
air speed over the surface of the test specimen in the test chamber
seme seent te, PROTECTED BYGORSREGHS2u/orsipmocsronczrn 13
A6921: 2014
A.2.1.9 mass transfer coefficient
coefficient of mass transfer derived from the concentration difference of target sub
stances between the test specimen and the ambient air over the surface of the test
specimen
A2.1.10 test start
time when the test specimens are set into the emission test chamber
A.2.1.11 time (day)
time (day) from test start to the starting time of air sampling
2.1.12 sampling period
period of time for air sampling from the emission test chamber outlet with sampling
tube or other devices
A.2.1.13 emission test chamber
enclosure with controlled operational parameters for the determination of VOC and
aldehydes emitted from wallpaper and wallcoverings
In this Annex, it is applicable to 20-L small chamber (the smallest size of chamber in
the size of small chamber specified in ASTM D 6007 : 1996).
A.2.1.14 emission test chamber concentration
concentration of specific VOC and aldehydes measured in the emission test chamber
outlet
‘The ratio of the mass of target substance sampled in the small emission chamber
outlet and the volume of air sampling during the sampling period.
A2.1.15 background concentration
concentration of emission test chamber outlet measured when clean air is brought into
the chamber without placing a test specimen
2.1.16 travel blank concentration
concentration of VOC and aldehydes in a sampling tube to which all procedures except
for air sampling have been applied in order to consider the contamination of a sam-
pling tube itself and the contamination at the time of opening, closing and transporta-
tion
2.1.17 product loading factor
ratio of exposed surface area of the test specimen to the free emission test chamber
volume
A2.1.18 recovery
total measured mass of known VOC and aldehydes supplied to the emission test
chamber during a given time period divided by the total mass of target VOC and alde-
hydes in the air exhausted from the emission test chamber in the same time period
seme seent te, PROTECTED BX,CORSBUGHSan or simosoosrousn=n 14
A 6921: 2014
NOTE 1 The recovery provides information about the precision of the tests car~
ried out based on this test method.
NOTE 2 The recovery test is carried out by using standard gas or gas of a known
concentration emitted with permeation tubes of aldehydes
A.2.1.19 emission factor : EF
product specific rate describing the mass of VOC and aldehydes emitted from a product
per time at a given time from the start of the test
NOTE: Area specific emission factor, ZF, is used in this Annex.
Several other emission factors can be defined according to different
requirements, e.g. length specific emission factor, EA, volume specific
emission factor, EF, and unit specific emission factor, ZF.
A.2.1.20 sample
wallpaper and wallcoverings
A2.1.21 test specimen
part of the sample specially prepared for emission testing in an emission test chamber
in order to simulate the emission behaviour of wallpaper and wallcoverings that are
tested
A.2.1.22 volatile organic compounds : VOC
organic compounds that are emitted from the test specimen and all those detected in
the emission test chamber outlet air
The emission test method described in this Annex is applied to the range of com-
pounds specified by the definition of total volatile organic compounds (TVOC). The
VOC that was selected and analyzed from a product is called target volatile organic
compounds (hereafter referred to as “target VOC”). The example of target VOC is
shown in Table A.1,
Table A.1_ Example of target VOC
‘Guideline concentration
260 g/m?
‘870 g/m?
xylene
Palichlorsbenzene
‘Ethyl benzene
Styrene
106-42-3
106-467 [240 pe/m?
tradecane '330_pighm®
A2.1.23 total volatile organic compounds : TVOC.
sum of VOC that is detected between and including n-hexane and nhaxadecane with
gas chromatography
‘The calculated TVOC is converted to the sum of peak areas using the toluene re~
seme seent te, PROTECTED BYGORSREGHS2u/orsipmocsronczrn 15
A6921: 2014
sponse factor.
When GC/MS is used, TVOC shall be analyzed by total-ion chromatography (TIC)
after measuring with a total-ion mass spectrograph (TIM). See JIS K 0123.
NOTE: The calculated TVOC is similar to the sum of the concentrations of ex-
tracted VOC in the air.
A.2.1.24 aldehydes
formaldehyde and other calbonyl compounds (aldehyde and ketone) that are emitted
from the test specimen and all those detected in the emission test chamber outlet air
‘The example of aldehydes is shown in Table A.2.
Table A2 Example of aldehydes
‘Name of chemical material
Guideline concentration
Formaldehyde, 50-00-0 100 g/m
Acotoaldehyde 75-070 48 yg/a?
A21.26 air
air used for testing having the same composition as atmospheric air.
A2.1.26 tracer gas
gas used for measurement of ventilation rate
A2.2 Symbols and units
A+ surface area of test specimen (m2)
C(O) : initial tracer gas concentration (g/m?)
CA) + tracer gas concentration measured in emission test chamber outlet air at a
given time, ¢, after the start of the test (ug/m*)
C,! tracer gas concentration at sufficiently long time (equilibrium time) after the
start of test (ug/m’)
¢,: VOC and aldehydes concentrations measured in emission test chamber outlet
at a given time, r (g/m)
Co. travel blank concentration at a given time, ¢ (j1g/m®)
EF, area specific emission factor (g/m? h)
EF,: length specific emission factor (ug/m-h)
EF,: volume specific emission factor (g/m? h)
EF,: unit specific emission factor (ug/unit h)
L * product loading factor (m*/m*)
Q : ventilation rate in emission test chamber (m‘/h)
seme seent te, PROTECTED BY,CORSBUGHSan or simosoosrousn=n 16
A921: 2014
¥ = volume of emission test chamber (m*)
ky? mass transfer coefficient of water vapour (m/h)
1 + length of test specimen (m)
n+ air exchange rate (time/h)
q * ventilation rate per unit area (m/m?-h)
1: time (h or days)
u ! number of test specimens (unit)
v ! volume of test specimen (m*)
nv + coefficient of air change performance
ta! nominal time constant
: the mean age
A3 Principle
‘The principle of this test is to determine the area specific emission factor of VOC and
aldehydes emitted from the wallpaper and walleoverings, to be tested by obtaining
emission test chamber concentration, passing air flow rate and surface area of test
specimen.
‘The area specific emission factor of VOC and aldehydes at a given time, 1, is caleu-
lated by passing air through the emission test chamber at constant temperature, rela-
tive humidity and ventilation rate, and with knowledge of the emission test chamber
concentration, travel blank concentration and ventilation rate from the outlet air (see
Al2).
A4 Apparatus
‘The apparatuses necessary for measuring the emission factor of VOC and aldehydes
emitted from wallpaper and wallcoverings are as follows.
— emission test chamber
—_ sealing material, seal box for test specimen
— clean air supply
—_ temperature control and humidification system
—_ integrating flowmeter
— oven
— air sampling device
— analyzer
A4.1 Emission test chamber The general specification and requirements to be ap*
plied to emission test chamber shall be in accordance with A.4.1 to A.6.5. An example
roomier, PROTECTED BYGORSREGHS2u/orsipmocsronczrn 7
A6921 : 2014
of emission test chamber system is as shown in Figure A.1
hermostat temperature iiication Mean air supply
control system) system (or cylinder)
Figure A.1_ Example of emission test chamber system
AA.1.1 Shape The part of emission test chamber coming into contact with the emit-
ted VOC and aldehydes shall be made of stainless steel, with a volume of 20 L + 0.5 L.
‘The emission test chamber shall be designed to ensure proper mixing of inside air.
Generally, any components mounted on the emission test chamber can be removable
for ease of washing and heat treatment.
Materials for mixing devices, e.g. fans and for sealing materials shall be low emitting
and low adsorbing, and shall not contribute to the emission test chamber background
concentration.
Moreover, the main chamber to be used shall be made of stainless steel (SUS304)
and the contamination from system itself and the adsorption of contamination sub-
stance shall be kept at a minimum. The shape is made cylindrical in order to minimize
leakage from joint part and to reduce the weld
‘The upper part of chamber is made cover-shaped and provided with a hole for sam
pling. The packing part is sealed with the frame low emitting, low absorbing polytetra
fluoroethylene resin. The whole part of chamber is made of stainless steel, removable
and suited for washing and heat-treating by disassembling. The fresh air shall be sup~
plied to the chamber through a shower tube so that it is mixed sufficiently inside.
AA.1.2. Airtightness The emission test chamber shall be airtight in order to avoid
uncontrolled air exchange with external air. The inside of emission test chamber shall
be operated at air pressure slightly higher than atmospheric air pressure to avoid any
influence from the laboratory atmosphere. If any one of the following conditions is sat
isfied, the chamber is regarded as being sufficiently airtight.
PROTECTE!
BYCORSREGH anor smoozsrensirn: 18
A921: 2014
a) The air leakage is less than 0.1 % of the volume of emission test chamber per mi-
nute at an over pressure of 1 000 Pa.
b) The air leakage is less than 1 % of the supply air flow rate.
A4.1.3 Air supply and mixing facilities The emission test chamber shall have facili-
ties (electronic mass flow controller, etc.) capable of continuously controlling the air
exchange rate at a fixed value. The requirements shall be in accordance with A.6.3.
A4.2 Sealing materials/seal box of test specimen When the chemical compounds
emitted from only the surface of test specimen are measured, seal the edges and the
back surface with aluminium foil or seal box.
Generally, the seal box shown in Figure A.2 is used. When two sets of this seal box
are used, the product loading factor comes to 2.2 m°%/m®, The frame to fix seal box and
test specimen shall be made of stainless steel. Place the frame of polytetrafluoroeth-
ylene between the test specimen and the stainless steel frame, fix them from the back
with screws and seal them.
Unit! mm
Fixing screw for building material (8 pieces)
Seal box Fixing screw for cover (12 pieces)
wr x &
/
Frame of stainless steel
Test specimen
Frame of polytetrafluoroethylene
187
Figure A.2- Example of seal box
A4.3 Clean air supply ‘The air to be supplied to the emission test chamber is re-
quired to be as clean as possible. In order to prevent an increase of background con-
centration, clean air supply or clean air of gas cylinder shall be used. The clean air
supply having the same composition as atmospheric air shall be used.
seme seent te, PROTECTED BYGORSREGHS2u/orsipmocsronczrn 19
A6921: 2014
A4.4 Temperature control and humidification system The control of temperature
shalll be carried out by placing the 20 L emission test chamber in the laboratory envi-
ronment controlled to the required temperature such as thermostat or by maintaining
the inside of emission test chamber at required temperature. Generally, the control of
relative humidity shall be carried out by maintaining the supplied air at required hu-
midity.
‘Temperature and relative humidity shall be monitored continuously and inde-
pendently of the system for controlling the temperature and humidity.
Precaution shall be taken to avoid condensation of moisture in the emission test
chamber or spray of water in the chamber.
A.4.5 Flow rate control apparatus For the pump for air control unit, the pump for
clean room shall be used. That is the pump (vacuum pump) capable of pushing out and
suctioning simultaneously, and the pushed air is separated to two systems and the flow
rate is measured.
The chamber shall be ventilated at the specified air exchange rate until the sampling
is carried out. The emission factor is estimated on the assumption of complete mixing.
‘The air in chamber shall be sucked in by the pump of air control unit during the
ventilation. The flowmeter with digital display is provided in the front of pump, and
the flow rate can be adjusted. At the time of sampling, the sampling pump provided
outside shall be used. The fresh air shall be supplied to the chamber through a shower
tube so that it is mixed sufficiently inside.
A46 Temperature and humidity recorder The sensor of temperature and humidity
and pressure gauge can be installed to the mixer, and their data can be output if nec
essary. For the emission test chamber, the value measured by using the temperature
and humidity measuring device installed in the mixer shall be regarded as the tem-
perature and humidity in chamber and be monitored continuously.
AA.7 Integrating flowmeter After an integrating flowmeter is set on the emission
test chamber outlet, the ventilation rate shall be accurately measured within the emis-
sion test chamber. Other equipment of performance at least equivalent thereto may be
used instead.
A48 Oven For the purpose of volatilizing VOC and aldehydes adhered in the emis-
sion test chamber, the oven capable of containing the emission test chamber and of
heating to at least 260 °C shall be used.
A49 Air sampling device For the sampling of air, the exhaust air at the emission
test chamber outlet shall be used. When an air sampling manifold is used, the air shall
be sampled directly from the emission test chamber outlet. If a duet or tube shall be
used, they shall be as short as possible and maintained at the same temperature as the
emission test chamber.
‘The duct and tube shall be made of minimal adsorption, e.g. polytetrafluoroethylene.
When the air flow rate at the time of air sampling is smaller than the ventilation
seme seent te, PROTECTED BYsCORSBUGHSsi or simosoosrousnan 20
A 6921: 2014
rate of emission test chamber, the ventilation rate shall be held constant using a sam-
pling manifold.
NOTE 1 The exhaust air from the emission test chamber shall be discharged
from the laboratory environment.
NOTE 2 A multi-port sampling manifold may be used to provide flexibility for
duplicate air sampling
A4.10 Analyzer For the analysis of VOC, gas chromatograph using mass spectrom-
eter (GC-MS) or gas chromatograph using flame ionization detector (GC-FID) shall be
used.
For the analysis of aldehydes, high performance liquid chromatograph (HPLC) shall
be used.
‘The equipment used for analysis shall be in accordance with JIS A 1962, JIS A 1965
and JIS A 1966. Other equipment with equal or higher accuracy may be used.
A Test conditions
A5.1 General
‘The test shall be carried out at the pressure close to the atmospheric pressure.
A5.2 Temperature and relative humidity
‘The temperature in the emission test chamber shall be 28 °C in principle. The rela~
tive humidity shall be 50 % as given in JIS Z 8703. The emission test chamber shall be
controlled within the following range of conditions.
‘Temperature: 28°C+1,0°C Relative humidity: (50 +5) %
Initial variance can be observed in the emission test chamber environment when
putting a test specimen in the emission test chamber, because of the difference of tem-
perature and relative humidity between the laboratory environment and the emission
test chamber. These variances shall be recorded.
‘Temperature and relative humidity affect the emission factor greatly. The ranges of
temperature and relative humidity indicate time-varying only. The distribution of
temperature and relative humidity in the emission test chamber shall be minimized as
much as possible.
A.5.3 Supply air quality and background concentration
‘The background concentration of supplied air shall be low enough not to interfere
with the emission determinations.
‘The pure water used for humidification shall not contain interfering VOC and alde~
hydes. The water quality shall be at least Al specified in JIS K 0557, and the target
component shall not be detected.
A.5.4 Mass transfer coefficient
‘The mass transfer coefficient on the surface of wallpaper and wallcoverings in the
emission test chamber should be 9 m/h to 18 m/h by converting it into water vapour.
seme seent te, PROTECTED BYGORSRIGHS2u/orsmpmocsroncer 21
A6921: 2014
When a fan is set in the chamber in order to stir, a forced convection field shall not be
made 18 m/h or over of the mass transfer coefficient.
NOTE 1 The volume of the mass transfer coefficient may influence the emission
factor for evaporative controlled emission. The emission factor depends
on substrate.
NOTE 2 The mass transfer coefficients 9 m/h to 18 m/h correspond approximate-
ly to air velocities 0.1 m/s to 0.3 m/s over the surface of building product
for test.
A.5.5 Area specific ventilation rate and air exchange rate
At steady state, the emission test chamber concentration depends on the area specif-
ic ventilation rate which is selected as a parameter in designing the emission test con-
ditions.
‘The standard condition of air exchange rate shall be 0.5 time/h + 0.05 time/h.
For the evaporative controlled building products such as adhesives and coatings (wet
adhesives, coating, ete.), an appropriate measurement shall be carried out by increas-
ing air exchange rate or decreasing product loading factor. The air exchange rate, n,
and the product loading factor, L, shall be to keep on the same condition, when com-
paring the results from different small chambers.
NOTE: The air exchange rate, », and the product loading factor, L, can influence
the emission factor.
For target substances which considerably adsorb to building product itself (e.g. for~
maldehyde), the measurement results of emission factor can be compared only when
the results are common in the rate of the product loading factor to the air exchange
rate (Lin, nil value).
A6 Verification of test conditions
6.1 Monitoring of test conditions
‘Temperature, relative humidity and ventilation rate shall be monitored and recorded
continuously with the following accuracies:
— temperature 40.5 °C
— relative humidity 25%
— airexchange rate £10 %
For the relative humidity, the humidity of outlet air may be measured.
AG.2 Airtightness of emission test chamber
The airtightness of emission test chamber shall be regularly checked by pressure
drop measurement, by comparison of simultaneous measurement of flow rates at the
inlet and the outlet or by measurement of tracer gas dilution.
6.3. Air exchange rate in emission test chamber
An integrating flowmeter is set at the emission test chamber outlet and the air ex:
seme seent te, PROTECTED BX,CORSBUGHSan or simosoosrousn=n 22
A 6921: 2014
change rate, 1 is obtained by calculating the measured ventilation rate, Q divided by
volume of emission test chamber, V.
The fluctuation of set value of air exchange rate shall be minimized. Generally, the
air exchange rate shall be checked by measurement of tracer gas dilution with a min-
imam frequency of every 12 months.
NOTE: When the test is carried out at the outlet by using an integrating flow-
meter, attention shall be drawn to the possibility that the back pressure
introduced by the instrument can lower the flow rate through the emis
sion test chamber.
A.6.4 Coefficient of air change performance in emission test chamber
‘The test to determine the coefficient of air change performance shall be carried out
by placing the test specimen or the inert substrate (c.g. glass plate or stainless steel
plate) of the same size as the test specimen in the emission test chamber.
After the tracer gas is adequately mixed with the supply air at constant concentra:
tion and flow rate, the concentration is measured at the outlet of emission test cham-
ber over time (step-up method). The coefficient of air change performance, 7) in the
emission test chamber is calculated from the temporal change by the value of nominal
time constant, tm divided by the mean age, <%. The coefficient of air change perfor~
mance should be at least 90 %. The age of the air at the outlet of emission test chamber
shall agree with the mean age. Alternatively, the tracer gas concentration at the
chamber outlet may be measured by supplying clean air after completely mixing tracer
gas in the chamber using a fan or other devices. The coefficient of air change perfor~
mance in the emission test chamber shall be calculated from the temporal change
(step-down method).
When the tracer gas concentration in the exhaust air from the emission test chamber
at time 1, is shown as C,(8, the tracer gas concentration at the sufficiently long time (at
the time of equilibrium state) is shown as C,, and the initial tracer gas concentration is
shown as C (0), they shall be as follows, respectively.
Coefficient of air change performance = *4/
Nominal time constant
Step-up method
Step-down method Foe [SO
vt CO)
A6.5 Recovery and sink effects
‘The recovery of target chemical substances can be determined using standard gas of
target component or gas of a known concentration emitted with permeation tube. The
concentrations generated shall be of similar magnitude to those expected during the
emission tests of building products.
seme seent te, PROTECTED BYGORSREGHS2u/orsipmocsronczrn 23
A921: 2014
‘Two or more emission test chambers may be connected in series.
‘The performance of emission test chamber shall ensure a mean recovery of not less
than 80 % for toluene and n-dodecane.
‘The recovery of other target VOC and aldehydes shall be also recorded.
‘The mean recovery shall be calculated from the ratio of outlet concentration to inlet
concentration at the chamber.
Dehumidified air shall be used in the case of determination of the recovery of hy-
drophilic VOC and aldehydes.
NOTE: Sink effects, leaks or poor calibration can cause difficulties to meet the
minimum accuracy required for tests. Sink and adsorption characteris~
tics are very much dependent on the type of VOC and aldehydes emitted.
Additional recovery tests using target VOC and aldehydes with different
molecular weight or polarity can be used to increase understanding of
these effects.
A.7 Sampling, transport and storage of sample
A7.1 General
When the emission test of VOC and aldehydes emitted from wallpaper and wall cov-
rings is carried out by using an emission test chamber, the products shall be properly
handled before and during the test.
This method is applicable only to the wallpaper and walleoverings newly manufac~
tured and yet to be used. The methods of sampling and transport, transport condition
and preparation of test specimens shall be as follows.
For unhomogeneous products, it is necessary to consider the possibility that different
test specimens must be measured in order to obtain the specific emission factor.
A72 Sampling
‘The product to be tested shall be manufactured, packaged and handled in normal
manner. The sampled building product shall be immediately packed and promptly sent
to the testing laboratory.
A.7.3. Sample packaging and transport
Samples shall be thoroughly protected from chemical contamination or any physical
exposure such as heat and humidity.
Every sample shall be wrapped separately in aluminium foil or in aluminised pack
aging (shiny side out) and sealed up tightly in polyethylene bag or one lined with clear
polyvinyl fluoride film,
‘Transportation of collected samples can affect the emission characteristics of the
product. The possible effects due to temperature shall be of particular concern.
A.7.4 Selection of samples from rolls
‘The selection of samples from rolls shall be as follows.
seme seent te, PROTECTED BX,CORSBUGHSan or simosoosrousn=n 24
A921: 2014
a) Take the sample from a position of at least 2 m inside the edge of roll.
b) Take 1 m of the sample in length with the roll width.
After taking the sample, roll it across the normal direction of the production roll.
Secure the roll with staples, wrap it in aluminium foil, place it in an unprinted, air~
tight polyethylene bag and seal up the bag. Each bag shall contain only one sample.
Not more than 1 h shall elapse from the time of taking the sample to packing it in
the polyethylene bag.
A.7.5. Selection of samples of board product
‘The selection of samples of board product shall be as follows.
a) Generally, the unopened standard package shall be used as the sample. If the test
specimens are difficult to cut in the testing laboratory, the test specimens prepared
according to A.9.3 may be sent to the testing laboratory.
b) Generally, each sample shall be wrapped in aluminium foil, placed in an unprinted,
airtight polyethylene bag and sealed. Each bag shall contain only one sample.
However, when more than one sample of the same product are prepared, each
sample may be separately wrapped in aluminium foil and put into one polyethylene
bag together.
A.76 Labelling of samples
The polyethylene bag containing the sample shall be labelled with the type of prod-
uct, date of manufacture and batch number. When the label is displayed, care shall be
taken so as not to affect the sample.
A.7.7. Storage of the sample prior to testing
The emission test of products shall be carried out with the shortest possible delay
after samples are sent to the testing laboratory. When the samples are stored in the
laboratory before starting the measurement procedure, in order to prevent the deterion
ration of the product, the sample shall be sealed airtight in the above-mentioned pack-
age during any period of storage, which is four weeks at most.
AS Preparation of emission test chamber
Before starting the test, the emission test chamber shall be disassembled and
washed. After the washing, it is heated in an oven to volatilize any remaining chemical
substance. If the emission test chamber cannot be placed in an oven, it is allowed to
heat the inside of the emission test chamber. After the heat-treatment, the emission
test chamber shalll be cooled enough for the measurement.
AQ Preparation of test specimen
A9.1 General
After preparation of the emission test, the sample shall be unpacked from the trans~
portation package, and a test specimen shall be prepared. The time of setting the test
seme seent te, PROTECTED BYGORSREGHS2u/orsipmocsronczrn 25
A6921: 2014
specimen in the chamber shall be regarded as the starting time of the emission test.
Generally, the product loading factor shall be 2.2 m*/m® + 0.2 m*/m®,
A9.2. Selection of test specimen from rolls
After unpacking the roll, the suitable part shall be selected at the middle of the sam-
ple. The test specimen shall be taken so that the one side of test specimen is made pat
allel to the longitudinal direction and that more colours constituting the pattern are
included.
When the sealing is not carried out, prepare one sheet of square test specimen of 147
mm +3 mm (see Figure A.3).
When the sealing is carried out, prepare two sheets of square test specimens of 165,
mm +3 mm (see Figure A.4).
Unit: mm Unit: mm
Roll width, Roll width,
z
* Test specimen
: /
g Test specimen | 3
a
4 8
a g
i :
Figure A.3. Without sealing Figure A.4 With sealing
9.3. Selection of test specimen from board product
‘Test specimens shall be cut out from the middle part parallel to the longitudinal di-
rection of board product. The middle surface shall be cut right to the upside of the test
specimen.
When the sealing is not carried out, prepare one square test specimen of surface area,
approximately 44 000 mm? including butt ends.
When the sealing is carried out, prepare two square test specimens of 165 mm + 3
mm.
PROTECTED BY,CORSREGEHToy,orsioso2srensirn: 26
A921: 2014
NOTE: Care should be taken to prevent the burns of the sectional surface by de-
vices.
A9.4 Sealing
‘The sealing shall be as follows.
a) Without sealing When VOC and aldehydes peculiar to the product are measured,
the edges and the back surface of test specimen shall not be sealed.
b) With sealing When VOC and aldehydes emitted from the whole surface of test
specimen are measured, the edges and the back surface shall be sealed by the
sealing materials such as aluminium foil, aluminium tape, or the seal box (Figure
A.2). When the test specimen is glued to the substrate, the proper conditions of the
quantity of adhesive, coating method and the time to be spent before bonding the
test specimen to substrate shall be selected. For VOC and aldehydes emitted only
from the butt ends of the test specimen, the measurement shall be carried out by
sealing other parts. For “wallpaper and wallcoverings coated previously with adhe-
sives, pressure sensitive adhesives, ete.”, peel off the release paper and stick wall-
paper and wallcoverings together, then test them.
NOTE : Instead of sealing, the emission from the back surface can be avoided
by adhearing two test specimens.
A.10 Test methods
A.10.1. Background concentration and travel blank concentration
An air sample of the chamber background is taken for one day before the start of a
new emission test, to quantify any background contribution of volatile organic com-
pounds from the empty chamber. Travel blank shall be analyzed every time air is sam
pled.
Background concentration and travel blank concentration shall be low enough so as
not to interfere with the emission determinations.
A.10.2 Test specimen location in the emission test chamber
‘The test specimen shall be positioned in the centre of the emission test chamber to
ensure that the air flow is evenly distributed over the emitting surface of the test
specimen.
a) Without sealing The test specimen shall be hung at the centre of emission test
chamber by using a supporting stand (Figure A.5).
b) With sealing The test specimen shall be stood at the centre of emission test
chamber by using two seal boxes (Figure A.6).
seme seent te, PROTECTED BYGORSREGHS2u/orsipmocsronczrn AG921 : 2014
Test specimen
Shower tube
Fan (if necessary)
‘test specimen without
(example)
Test specimen
Shower tube
Fan (if necessary)
Figure A.6 Measurement of test specimen with
sealing process (example)
A.10.3 Time for measurements of emission test chamber concentration
A.10.3.1 General
After starting the test according to A.10.3.2, air sampling shall be started at prede
fined sampling times in accordance with A.10.4.
A.10.3.2. Emission test
Check the integrating air flow rate through the emission chamber and the air tight
ness. Verify that the outlet air flow rate during air sampling is equal to the inlet air
flow minus the air flow at the time of air sampling.
Ai
samples shall be taken after 1, 3, 7, 14+ 1 and 28 + 2 days, in pri
of the test. In addition, a
ciple, after the
rried out at additional times.
ampling may be ¢:
NOTE 1 The test durations may be selected depending on the purpose of the test:
tr, PROTECTED BY,CORSREGEHToy,orsioso2srensirn: 28
A921: 2014
NOTE 2 If decay studies are required, air samples can be taken after 28 days or
longer after the start of the test.
NOTE 3 If the test chamber concentrations become lower than the quantification
limit, the test may be completed.
A.10.3.3° Storage of test specimen
‘The test specimen shall be stored under the same measurement conditions, when
removed from the emission chamber in long-term testing. The removed test specimens
can be exposed to air freely, but they should be kept in a safe place to minimize con-
tamination of test specimens by other test specimens or the place where stored. The
test specimens should be returned to the chamber at least 24 h before air is sampled.
Preservation of test specimens in high temperature shall be avoided.
A.10.4 Air sampling
‘As sampling tubes, Tenax-TA or others shall be used for sampling VOC, and DNPH
cartridge shall be used for sampling aldehydes. In 8 h or longer after supplying the
emission chamber with clean air, the temperature and relative humidity shall be con
firmed to be at steady state. Then a sampling tube shall be connected to the chamber
and the emission test chamber concentration in the chamber after one day, and the
travel blank shall be measured.
After that, the emission test chamber concentration in the chamber and travel blank
shall be measured at each given time.
If the concentration in the chamber is hardly predictable, two sampling tubes shall
be connected to confirm there is no breakthrough in a series. Presence or absence of
breakthrough shall be judged by formula (A.5). Absence of breakthrough can be con
firmed when the calculated value is % or over, because it means that VOC and al-
dehydes are adsorbed only in the primary sampling tube.
a 1002 95(%4) -(A.5)
where, C,}_ concentration of tubing upstream of air (front)
C: + concentration of tubing downstream of air (rear)
‘The sampling tube shall be in accordance with JIS A 1962, JIS A 1965 and JIS A
1966.
A.11 Analysis method
‘The analysis method shall be as follows.
a) Analysis of VOC After connecting Tenax-TA tube to a thermal desorption appa-
ratus, VOC are desorbed by heating. The analysis method of VOC shall be in ac~
cordance with JIS A 1965 and JIS A 1966.
b) Analysis of aldehydes The DNPH derivatives of carbonyl compounds in a DNPH
cartridge is dissolved and desorbed using acetonitrile. The analysis of aldehydes
shall be in accordance with JIS A 1962.
seme seent te, PROTECTED BYGORSREGHS2u/orsipmocsronczrn 29
A6921: 2014
A.12 Calculation of emission factor and expression of results
‘The area specific emission factor, Hf, at a given time, é, from the start of measure-
ment after placing the test specimen in the emission test chamber can be expressed by
formula (A.6). The concentration of the emission test chamber, G, shows the concen
tration of target VOC and aldehydes or of TVOC at the time, t while Cin: shows the
concentration of travel blank at a given time f.
Area specific emission factor, EF
(CCQ (CC
A 4
EF,
Ae CadegHe-Cay ae
For certain purposes, the emission factor, HF, can be calculated from
time concentration profiles, or by applying the decay model from concen"
tration time data.
A.13. Test report
The test report shall include the following information.
a) Test laboratory
— name and address of the laboratory
— name of the responsible person
b) Sample description
— Type of product (and brand name, if appropriate)
— sample selection process (e.g. random)
— product history (date of production, batch number, date of arrival to the test labor
atory, date and time of unpacking and of test specimens preparation)
©) Results
— emission factor of target VOC and aldehydes or TVOC after the predefined time
from the start of test
NOTE: When the building product of in surface area Az in indoor space model
is used according to the method in Annex B, the incremental value of
air concentration of target VOC and aldehydes, or TVOC may be de~
seribed.
@) Data analysis
— method used to derive specific emission factor ZF from measured concentration of
emission test chamber (specify mathematical models or formulae used)
— conversion formula used for calculation when the test conditions of temperature
and relative humidity are changed
) Test conditions
seme seent te, PROTECTED BX,CORSBUGHSan or simosoosrousn=n 30
A921: 2014
@)
emission test chamber conditions (temperature, relative humidity, air exchange
rate, mass transfer coefficient)
test specimen area and product loading factor
with or without sealing
information on the air sampling of target VOC and aldehydes (adsorption tube
used, air volume sampled, sampling duration and times after introduction into the
emission test chamber)
Measuring devices
information on equipment and method used (e.g. emission test chamber, sealing
material, seal box, clean air system, temperature control and humidificaton system,
integrating air flowmeters, oven, air sampling devices, analyzer.)
Quality contro/quality assurance
background concentration and travel blank concentration of target VOC and alde~
hydes
recovery data to evaluate sink effect of target VOC and aldehydes
number of measurements
in the case of duplicate sampling, results of individual analyses
accuracy of temperature, relative humidity and air exchange rate
quality assurance report
Additional contents For the evaporative controlled building product such as ad-
hesives and coatings, and the bonded product with adhesives, the following con-
tents shall be additionally stated in the test report.
number of test specimens
amount per unit area
thickness
other items which can affect the test result (drying conditions, aging, storage,
moisture content, surface treatment, etc.)
type of adhesive used (material and non-volatile matter)
quantity of coating (g/m?)
coated area
method of coating
time between application of adhesive and application of surface material (open
time)
type of substrate
PROTECTED BYCORSREGHSu or taoscocsrewsren 31
AG921 : 2014
Annex B (informative)
Calculation of incremental value of air
concentration in indoor space model
B1. General
‘This Annex is to describe the calculation method of incremental value of air concen
‘ation in indooor space model for the emission factor EF obtained according to the
emission test chamber method (Annex A).
B.2 Calculation method of incremental value of air concentration in indoor space
model
For the purpose of considering the influence in indoor space model, the incremental
value of indoor concentration of VOC and aldehydes by using the building product of
surface area rz can be presumed by using formula (B.1), When adsorption cannot be
ignored regarding sample loading factor, the correction of emission amount is required
‘The indoor space model is shown in Figure B.
Ceiling area 7m?
/Wall area 24 m?
Sealing material 0.2 m*
Air exchange ral
0.5 times/h Volume 17.4 m*
NOTE: This indoor space model has been based on Danish Standard.
Figure B.1 Indoor space model
EF, x Ay
ac ‘B.D
‘ie Ve
where, An surface area of each part (mn®)
(wall 24 mt, floor 7 m?, eeiling 7 m*)
AC incremental value of air concentration when using building
product of surface area Ar (g/m)
EF, : area specific emission factor [yg/(m? - h)]
mm: air exchange rate in indoor space model (0.5 times/h)
Vi: volume of indoor space model (17.4 m*)
PROTECTED BY,CORSREGEHToy,orsioso2srensirn: 32
A921: 2014
The increment of air concentration based on wallcovering material can be obtained
according to formula (B.2)
AGuatt = 2.8EFs
“(B.2)
‘The increment of air concentration based on floor material can be obtained according
to formula (B.3)
(B.3)
‘The increment of air concentration based on ceiling material can be obtained ac~
cording to formula (B.4)
AGooting = O.8EFs oo(B.A)
For example, when the area specific emission factor from walleovering material, EF,
is 50 pgm? -h
AGrait = 2.8EF, = 2.8 * 50 = 140 ug/m®
Bibliography
JIS A 1460 Building boards Determination of formaldehyde emission — Desicator
method
JIS A 1901 Determination of the emission of volatile organic compounds and al-
dehydes for building products — Small chamber method
JIS A 1962 Indoor air — Determination of formaldehyde and other carbonyl com-
pounds — Active sampling method
JIS A 1965 Determination of volatile organic compounds in indoor and test cham-
ber air by active sampling on Tenax TA® sorbent, thermal desorption
and gas chromatography using MS/FID
JIS A 1966 Indoor air — Sampling and analysis of volatile organic compounds by
sorbent tube/thermal desorption/capillary gas chromatography —
Pumped sampling
JISK0123 General rules for gas chromatography/mass spectrometry
JIS K.0557 Water used for industrial water and wastewater analysis
JISK 7136 Plastics — Determination of haze for transparent materials
JIS P8222 Pulps — Preparation of laboratory sheets for physical testing
ENV 13419-1: 1999 Building products — Determination of the emission of volatile
organic compounds — Part 1: Emission test chamber method
ENV 13419°3 | 1999 Building products — Determination of the emission of volatile
organic compounds — Part 3 ' Procedure for sampling, storage
of samples and preparation of test specimens
ASTM D 5116: 1997 Standard Guide for Small Scale Environmental Chamber De~
roomier, PROTECTED BYGORSREGHS2u/orsipmocsronczrn 33
A6921: 2014
terminations of Organic Emissions trom Indoor Materi-
als/Products
ASTM D 6007: 1996 Standard Test Method for Determining Formaldehyde Con-
centration in Air from Wood Products Using a Small Scale
Chamber
Danish Standard INF 90: 1994 Direction for the determination and evaluation of
the emission from building products
ECA Report No.19 : 1997 Total volatile organic compounds (TVOC) in indoor air
quality investigations
‘Technical Note AIVC 28: 1990 A Guide to air change sufficiency, Air Infiltration
and Ventilation Centre
Committee on Sick House Syndrome : Indoor Air Pollution, Ministry Health, Lax
bour and Welfare, Progress Report — Sum
mary on the discussions at the Ist and 3rd
meetings, June 29, 2000
Committee on Sick House Syndrome: Indoor Air Pollution, Ministry Health, La-
bour and Welfare, Progress Report — Sum-
mary on the discussions at the 4th and 5th
meetings, December 22, 2000
Committee on Sick House Syndrome: Indoor Air Pollution, Ministry Health, La~
bour and Welfare, Progress Report — Sum-
mary on the discussions at the 6th and 7th
meetings, July 24, 2001
Committee on Sick House Syndrome : Indoor Air Pollution, Ministry Health, Lax
bour and Welfare, Progress Report — Sum"
mary on the discussions at the 8th and 9th
meetings, January 22, 2002
roomier, PROTECTED BY,CORSBUGHSan or sicsaoosrousn 34
A6921: 2015
ay eva wu9q9 Jo oRdLDE9p ON uuonduosop oN,
seu
ope siujzanco
poyroods arv 11 puw | suorrpuos soy,
‘uorrpuoo 3804,
£1qL,
+ 91QUL UI pogroods
8 urqqna op ssoursy moj09 205 wEIARLA
-poyoods oxw J] pu | =] suorrpuos 3804,
unqgn oy
sadvdyjus jo 3uiqqns 0} onp Sumpey won cous sssounsuy ano
Anojo> Jo Saudp amp OWWNTEA OF -ar wonDtg 09.205 894,
9pi0 ur pouopiod st 380) omp OUTS ze9 2p oy) jo uonesaaTy ze9
“poppe st 919
‘porguryp ta ‘sonrsoype aanistos amnesard ‘saatso
you avy sampaoord 3899 ou “Ut ata Aysnotaard payvoo sBurzaxoayTus pun
xoaooqTea paw radvdyres Jo odvdi[ea, jo o8v9 om ur sampooard 3801 | sporowr yoy,
-BEP amp UF papnyoUr 1 4F YBNOUT uuonduosop oN, Jo uonduosap ax ‘609 pagpoads owp 403, ©9
| SPOT SPOT
guou0) uw Joqumyy aua1009 uv zoquiny,
worst 399 UoswoRt [
(6002 1869 V SIP) WORTPO SHOWA
(H10e 1269 V Sin) orspe suaLM
‘suOTsTAAX JuBOGTUBTS ATTeOTUYIe} UO PIEPUBIG ST} JO SUOTTPA JuOTINO puw snotAdrd woaMyoq oTqE} WoSTXEdUIOD
(eapemzeyuy) O xouuy
PROTECTED BY COPYRIGHT 35,
A6921: 2015,
pounsuo or Suuuye woReUE
-tgyur pu oouvysqns aanesnes
‘9q) Jo 98n ot eK ORIEPUOD a4 HO
soursqne aariesnes oy
worst 20) Koso
quo uy
pur Joquny
utsyn.uapt 69 paagosou waog sey ws
“wos wurureyuoo apgqns ‘snarosunp wonwarare
i944 34 RAL “Pap9eH BT OpYNE poy | too opying
uaBarpsy jo dorezouad ‘3809 sy UT | pods st y90) uoryeuFUEyUOD opyTAS OM, Leo -powoyop st 3609 omp amoqe uondts9s0¢]
388
“uomupe smorsard wasuans 19y4 ‘uw
198 Jou sea poods ops} OU, wondussop oN e9 | tod uw 90g wv 108 1 poods ofssuoy ou,
Ranpne
ome Joye y Fz "Ee amaty uty pue g “y s1UI0d
-oxpe oxp Burrazosqo &q porenyeas | .qne ason ayy pu aoatd aon oq Jo WoRROK, ‘Burypaqo prvoq asm a43 pUrw a00%d 39m oy
2.04 patpnt st Samnqusjzom sy | pe jo omeas op aasosgo “yonas 099 oaNy ‘uoomi0q WoRTpuOD HoaEPE OMA a108q0,
vuoas st] ae aye Y Fg PuE YF YZ 30 om OM oen 04 T8Ys (SV) PrUpuERS [eINa|ND
souwmoqts oy ‘uonrpe snorsard og | v_9 pun g “Vy Jo 410d YovO UO “aoupAN ou “hay osoundog- oy wt poytoods poomsyd
‘ur paypoods yeep over tte} 304 Soop | uo yoRas oq [TEYS yorEA TEE ¢ MEAP S89] 1. “poomsyd jo aseo a4} ty “poosstd ao yonb
pawog 3801 Jo az ax aout “poomstd | jo reuiaywus aures ax “poms jo asw9 amp aed stony “wunoruodet winqysydrprozeo pue
SVEJ0 ost oy, uy “Sumnquas yen | uy -posn 9q Seu yonbred y “umonUOdet uM iwaogo rouse “uEneT Jo Su 94 [Leys
‘q3J0 wonesaprewoo ut ‘alquayidde | |Sydrpraieo puw epEsogo wrjouBeWE “weNe ‘awog 280) ayn Jo speLaTEyY “uorsTRIGE ome
{J "pom 9q 01 st gvp ur pogoods | Jo suv og tTeys pxvog i899 oWp Jo sTeLIORU 00 [Sta 94 9g PUY YamIDS % OB J0 9104 WIE
sr yor poomsid ‘pavog 3803 oy | -wowsTnuro apwr00U [AULA % OF PUY YaIS yoo | Surscun 49 parwdoud wus 20 Zz69 V SI Ht wo
og ‘oem pwn32e 04 asoyo axous yey o» %6 08 Joos w yw Hurst sq paredad | Synquyoyy | pagwods z eem1g Z ody, 20 1 weUI Zodsy, | SaqUION
paioare tog sey ampacord 3809 ow, | 34H. St 380) AIMGUGION Jog aAISOGPE OU ¥69 | Jor st 9901 AaMqMAION 205 anBsOUPE OU, reo
TAUPO ST ATO
auau09
uv soquiny
(8007 = 1269 V SI) worNIpD eHOWATG
(H0z 1269 V SIN) woTpe uO,
PROTECTED BY COPYRIGHT ‘suonnwoard Arwewao0u TOMI
adiuioys puw wodsue uo suonneoaig (q
5
g
&
&
5
8
5
5
e
ungqn ot weeny 8
3
Ez
seuroqwur femme mojo pu ssaunsey anojoo yo