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A red precipitate is obtained, which fixes itself directly on cotton thread immersed in the liquid, and dyes it a delicate rose pink, which is, unfortunately, very fugitive. Silk can be dyed like cotton. The colour is not fast against light. Turmeric is the root portion of a plant called curcuma tinctoria, that grows in Southern Asia. The principle forming the colouring matter is "Curcumin."
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