Textile Dyeing – Dyes and Pigments

Textile Dyeing – Dyes and Pigments

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Textile engineers in particular need to be aware of the differences between Dyes and Pigments. There are obviously numerous notable differences between the two: Dyes are applied to a fabric or yarn and come in both liquid and solid form, while Pigments are solely solids. Pigments are usually insoluble in water and both physically and chemically unaffected by the substrates in which they are incorporated.

Here are the general differences between Dyes and Pigments

Dyes are soluable in Water Pigments are,100% insoluble.
Dyes are,composed of Organic substances. Pigments are composed of organic and nonorganic material
Dyes have three components:
Chromophore, Auxhochromo and Chromogen
Pigments have only two components : Chromophore and Chromogen
Dyes are selectively applied Pigments can be applied to all fibres
Dyes have good fastness properties Pigment has average fastness properties
Dyes are widely used in Dyeing Pigments are widely used in Printing
Dyes are comparatively expensive Pigments are comparatively inexpensive
A long period is needed for dyes to be applied Pigments need less time to be applied
Dyes have a direct affinity to fibres Pigments has no affinity to fibres and need other modifiers to increase its affinity