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=== Dyes, Mordants and Pigments ===

=== Dyes, Mordants and Pigments ===

Main article  

{{Main article|Chemistry of Dyeing (रञ्जनम्)}}

 

Archeological and literary evidences prove that the art of dyeing was practiced since early days of Indian civilization. A dye is a colored substance which imparts more or less permanent color to other materials. Colored substances usually organic chemical compounds were used for textile dyeing. Dyes which are prepared in the form of powder, paste or solution are utilized generally in coloring cotton, wool, silk and cloth of natural fibres, in cosmetics and manufacture of ink etc. Many soluble dyes are converted into pigments by forming insoluble salts (ex - by replacing sodium in a dye salt with calcium) for use in lacquers, paints etc. Dyes were also used for artificial coloring of food items and soft drinks. They are also used for coloring hair, fur, metals etc.

Archeological and literary evidences prove that the art of dyeing was practiced since early days of Indian civilization. A dye is a colored substance which imparts more or less permanent color to other materials. Colored substances usually organic chemical compounds were used for textile dyeing. Dyes which are prepared in the form of powder, paste or solution are utilized generally in coloring cotton, wool, silk and cloth of natural fibres, in cosmetics and manufacture of ink etc. Many soluble dyes are converted into pigments by forming insoluble salts (ex - by replacing sodium in a dye salt with calcium) for use in lacquers, paints etc. Dyes were also used for artificial coloring of food items and soft drinks. They are also used for coloring hair, fur, metals etc.