Cutch Extract – This powder is an extract prepared from steeping the wood of the Acacia catechu tree in hot water until a syrupy liquid emerges. This is dried and then ground into powder. Cutch is obtained from the heartwood of Acacia catechu, a tree native to the Indian subcontinent and parts of Southeast Asia, including Myanmar and Indonesia.
Indian cutch is by far the most beautiful. It is a good source of colourfast shades of cinnamon, nutmeg, and clove. Cutch extract contains tannins as well as the dye component catechu. It is easily soluble in water. Cutch has excellent light and washfast properties. It requires 20-50% WOF to dye a medium depth of shade.
Dyeing Guide: completely dissolve the powdered cutch ( in boiling water and add it to dyebath.
Deeper colours can be achieved by first soaking the cutch extract in a weak mixture of caustic soda. Add 1 tsp lye or sodium hydroxide to 4 litres (1 gallon) of water. Soak for 1 hour. Then add more water and neutralize with acetic acid or vinegar to pH7. Add this neutral solution to the dyebath.
Fibres are then added and the dyebath is kept at a low simmer for at least two hours. Cutch does not easily exhaust and dyebaths can be used multiple times for lighter shades.
The alum mordant yields toffee browns. The addition of iron at 2-4% WOF yields chocolate browns, while a soda ash rinse will redden the cutch colour. The addition of 2% WOF hydrogen peroxide during the final 15 minutes of dyeing will darken cutch considerably. Allowing the fibre to cool down and sit in the dyebath overnight will give the darkest shades.
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