What do you mean by pigments
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The following are some of the attributes of pigments that determine their suitability for particular manufacturing processes and applications:
Lightfastness and sensitivity for damage from ultraviolet light
Heat stability
Toxicity
Tinting strength
Staining
Dispersion (which can be measured with a Hegman gauge)
Opacity or transparency
Resistance to alkalis and acids
Reactions and interactions between pigments
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a pigment is a material or matter that changes the colour of reflected or transmitted light as the result of wavelength selective absorption. pigments that are not permanent are called fugitive.
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