Vegetable tanning is an age-old artisanal technique that dates back to ancient times. Unlike the more common chrome tanning method, which uses chemicals, vegetable tanning relies on natural substances found in plants. The process involves immersing animal hides in large wooden drums filled with tannins extracted from tree barks, such as oak, chestnut, and quebracho. This labor-intensive method takes longer than chrome tanning, but the results are unparalleled.