**2.5 Wood tans**

The important species yielding wood tans are Quebracho (*Quebracho Colorado*), this species is widely distributed in South America. The heart-wood contains 20-27 % tannin, which is obtained by cutting the wood into small chips and extracting the tannin with water. The cutch, a byproduct from Katha industry, obtained from khair (*Acacia catechu*) heart wood is used for tanning purposes.
