Dye is an organic compound with strong colouring ability, bright color, complete chromatogram and large colouring power. The colorants used in the plastic industry are mainly pigments, which can be divided into inorganic and organic two kinds. Inorganic pigments have good thermal stability, while organic pigments have high coloring strength and bright color.
Pigment is a fine powdered coloured substance, insoluble in water, oil and solvents, but well dispersed in it. Pigment is the secondary film-forming material of paint, which is used in the preparation of primer, putty and wood coloring in the wood decoration process. A dye is a compound that, in a certain medium, can make fibers or other substances firmly colored.
Dyes can be used for dyeing fibers, wood, paper, leather, cellophane, etc., among which the most used is textile printing and dyeing.Pigment is the manufacture of paint, ink, oil painting paste, makeup, color paper and other indispensable raw materials. It is also used for filling and coloring of plastic, rubber products and synthetic fiber stock.