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 ..
This dye is extracted from walnut hulls and gives a rich brown. A mordant is not needed, but alum can be used to alter the colour. To develop the colour, the extract needs to be simmered for 2 hours and left overnight before adding the fibre.
50 g walnut extract dyes up to 250 g wool to a dark shad..