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Time CalendarMonday, February 19,2018

Dye composition

The crystallised dye consists of three closely related pigments, namely, curcumin, oleoresin and demethoxy curcumin and bis-methoxy curcumin. All three components have similar solubility characteristics and tinctural power. True curcumin exhibits a more reddish shade. The three components can be separated by chromatography but crystallise as a mixture.