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Catechu (also known as cachou, cutch, cashoo, or Japan earth) is an extract of any of several species of Acacia—but especially Acacia catechu—produced by boiling the wood in water and evaporating the resulting brew.
Additional recommended knowledge
Catechu (called katha in Hindi) is an astringent and has been used since ancient times in Ayurvedic medicine as well as in breath-freshening spice mixtures. Black Catechu has recently also been utilized by Blavod Drinks Ltd. to dye their vodka black. 
Also called cutch, it is a brown dye used for tanning and dyeing and for preserving fishing nets and sails.
White cutch, also known as gambier, gambeer, or gambir, has the same uses.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Catechu". A list of authors is available in Wikipedia.|