Pigments are insoluble coloring materials mostly mineral origive have been used for the coloration of metal, wood, stone and textile materials pigment may be organic or inorganic compounds, It is composed of two ports, such as:
(1) Chromophore (2) chromogen
Examples of pigments are:
(1) Quinocridone
(2) Dioxazine
(3) Perylene perinone
(4) Fluorubine
(5) Pyrocoline
(6) Insiondoline
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