Catechu Brown

The wool is boiled for 1 to 1-1/2 hours, with 10 to 20 per cent
catechu, then sadden with 2 to 4 per cent of copper sulphate, ferrous
sulphate, or chrome, at 100 deg.C., in a separate bath for 1/2 hour.

Next: Alder Bark

Previous: Light Grey