Cutch 50g
Cutch (Acacia catechu) is common in India and Burma, and is the rich reddish brown color seen in Indian textiles. It will give good results on all fibres. 
The addition of 10% hydrogen peroxide or 2% dissolved soda ash in the dyebath will dramatically deepen the color. Cutch combined with iron will yield a lovely chocolate brown.
It requires a longer simmer time to develop the deepest shades.  It is lightfast and washfast.
50g cutch dyes 250g wool to a dark shade.