Environmental friendly synthesis of natural dyes and pigments

Abstract

Natural dyes comprise those colorants (dyes and pigment) that are obtained from vegetable, animal or mineral matters without chemical processing. These dyes are used in coloration of textiles, food, drugs and cosmetics. Small quantities of dyes are also used in coloration of paper, leather, shoe polish, wood, cane, candles and such other products requiring coloration. This article attempts to reviews the chemical constitutions of natural dyes and discussed about the available colour shades of natural dyes.