Pigments for rubber grommets

The coloring of rubber grommets is mainly based on pigments, and dyes are rarely used. Dyes are mostly used in hard transparent plastics, and there are also dyes mixed with some pigments in rubber, but few. A pigment is a colored substance that is insoluble in water and a solvent, insoluble in a colored substance, and does not chemically react with it.

Among them, inorganic pigments are mainly iron, chromium, cadmium, titanium, antimony, lead, zinc and other compounds. The utility model has the advantages of good stability to light and heat, strong hiding power, good migration resistance, good water resistance and solvent resistance, low cost and easy availability, and plays an important role in colorants. The disadvantages are less chromatogram, poor clarity and transparency, low tinting strength, and some varieties are toxic.

Compared with inorganic pigments, organic pigments have many varieties, bright colors, low density, good transparency, strong tinting strength, and small amount of use, but light resistance, migration resistance, temperature resistance, chemical resistance, and hiding power are generally poor. And the price is expensive, the application is limited.