Abstract
Natural dyes encompass colorants (dyes and pigments) derived from animal or vegetable matter without chemical processing. Predominantly mordant dyes, they also include vat, solvent, pigment, and acid types. Used in textiles, foods, drugs, cosmetics, and other applications such as paper, leather, shoe polish, wood, cane, and candles, natural dyes were historically the sole source of dyes. However, challenges like standardized application and dye standardization arose due to influences from climate, soil, cultivation methods, etc. To compete with synthetic dyes, standardization methods play a crucial role. This paper outlines conventional application methods, identification techniques, and the standardization process for natural dyes.
Natural dyes, derived from animal or vegetable matter without chemical processing, encompass colorants such as mordant dyes, vat, solvent, pigment, and acid types. They find application in textiles, foods, drugs, cosmetics, paper, leather, shoe polish, wood, cane, and candles. In the past, dyes were exclusively obtained from natural sources, but with the accidental synthesis of mauveine in 1856 and the commercialization of coal tar dyes (synthetic dyes), natural dyes declined. Synthetic dyestuffs gained acceptance for their advantages in application, color range, and availability.
Status of Natural Dyes in India: India has a rich tradition of using natural dyes, practiced by traditional craftspeople. While natural dyes alone have limitations in fastness and shade brilliancy, combining them with metallic mordants produces vibrant and durable colors. Although metallic mordants pose some eco-friendliness challenges, the associated pollution problems are minimal and manageable. Mild Chemistry provides an alternative to unsustainable technology for achieving similar results.
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Dr. Ruma Chakrabarti is an Associate Professor at Kumarguru College of Technology, and A. Vignesh is the Technical Compliance Manager at Hohenstein India Pvt. Ltd.
Natural dyes encompass colorants (dyes and pigments) derived from animal or vegetable matter without chemical processing. Predominantly mordant dyes, they also include vat, solvent, pigment, and acid types. Used in textiles, foods, drugs, cosmetics, and other applications such as paper, leather, shoe polish, wood, cane, and candles, natural dyes were historically the sole source of dyes. However, challenges like standardized application and dye standardization arose due to influences from climate, soil, cultivation methods, etc. To compete with synthetic dyes, standardization methods play a crucial role. This paper outlines conventional application methods, identification techniques, and the standardization process for natural dyes.
Natural dyes, derived from animal or vegetable matter without chemical processing, encompass colorants such as mordant dyes, vat, solvent, pigment, and acid types. They find application in textiles, foods, drugs, cosmetics, paper, leather, shoe polish, wood, cane, and candles. In the past, dyes were exclusively obtained from natural sources, but with the accidental synthesis of mauveine in 1856 and the commercialization of coal tar dyes (synthetic dyes), natural dyes declined. Synthetic dyestuffs gained acceptance for their advantages in application, color range, and availability.
Status of Natural Dyes in India: India has a rich tradition of using natural dyes, practiced by traditional craftspeople. While natural dyes alone have limitations in fastness and shade brilliancy, combining them with metallic mordants produces vibrant and durable colors. Although metallic mordants pose some eco-friendliness challenges, the associated pollution problems are minimal and manageable. Mild Chemistry provides an alternative to unsustainable technology for achieving similar results.
Read Full Article
Dr. Ruma Chakrabarti is an Associate Professor at Kumarguru College of Technology, and A. Vignesh is the Technical Compliance Manager at Hohenstein India Pvt. Ltd.
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