Tanning stuff is a kind of plant tissue rich in vegetable tannins (tannin content ≥ 8%), which has industrial development value
Such as wood, bark, fruit, leaf, root, etc.
Wood - hardwood, chestnut, oak, catechu
Bark - Vitex bark, Myrica rubra, Daphne odorifera, larch, fir
Fruit-fragrant fruit and Ko
Shell of acorn and Tara
Root -- red root, Rumex root
Leaves- Lacquer leaf, Cotinus coggygria and tea
Gall gall
