Cutch is both a dyestuff and a tanning agent. It has been used in India since ancient times.
This cutch dye powder is an extract prepared from steeping the wood of the Acacia Catechu tree in hot water until it turns into a syrupy substance which is then pressed and dried before being ground into a powder.
As a dye cutch yields yellowish browns, nutmegs, grey-browns and olive greens.
2% of dissolved soda ash in the dyebath will dramatically deepen the colour.
Cutch combined with iron will yield lovely chocolate browns.
It has excellent light and washfast properties – requiring 20 – 50% WOF to dye a medium depth of shade.
There is enough tannin in cutch so mordanting with tannin is not required.