How to get the best out of this toner: This toner will give stunning purple grey reflects. Make sure that hair is level 8 or higher. See chart below to see what level 8 looks like. This toner can be combined with other toners such as 9V, 9B, 10V and 10B. If you do that you will be able to custom-adjust the exact amount of purple versus other pigments. Mix the contents of the developer bottle with the toner in an applicator bottle. The corrrect mix is 1 part toner to 1 part developer. Pour over hair and rub thoroughly. Rub product well into hair to ensure product saturation Leave in 10 minutes, and then rinse.