Catechu (Cutch) is an old Indian dye for cotton. It can also be used
for wool and silk, and gives a fine rich brown. It is obtained from
the wood of various species of Areca, Acacia and Mimosa trees. Bombay
Catechu is considered best for dyeing purposes.
Catechu is soluble in boiling water. It is largely used by the cotton
dyer for brown, olive, drab, grey and black. (See pp. 46, 47, 48.)
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