Natural Dye Extract Cutch The best variety of Cutch (Acacia catechu) is common to most parts of India and Burma. Cutch is used for many purposes, e.g. as a breath freshener and a diuretic. The extract is made by steeping the wood in hot water until the liquid becomes syrupy. The thick liquid is cooled, pressed, then cut into cubes and ground into a powder for dyeing. It has a naturally high level of tannins often used for tanning hides. Cutch gives gray-browns with an iron mordant and olive-browns with a copper mordant Color: Caramel to Coffee Brown