Vegetable tanning, which appeared in Antiquity, requires the use of vegetable tanning agents mainly extracted from tree bark (most often oak, mimosa, chestnut, quebracho...), leaves or roots. Its more natural rendering makes it a technique prized by the big luxury houses in order to work skins of excellent quality. It can be carried out by soaking the skins in vats containing tannins or in drums (a rotating wooden vat used during the dyeing process.) It is carried out slowly over periods ranging from a few days to several months. Thus, today only 10% of the world's tanning is of vegetable origin because it is longer and more expensive.
Natural, it uses only biodegradable products making the leather hypoallergenic and offers an eco-responsible alternative to mineral tanning using heavy metals such as chrome. This industry is one of the most polluting in the world.