Plastic  masterbatch colorants include pigments and dyes, in which the dye to oil-soluble dyes, alcohol-soluble dyes and disperse dyes, can be dissolved in the resin, penetration and adsorption of color, especially for transparent resin Such as polystyrene coloring, with bright shade, but heat, light and solvent resistance is poor.
Pigment colorants include inorganic pigments and organic pigments, all in the form of particles dispersed in the resin, plastic and its coloring. Inorganic pigments have high thermal stability and durability, but the color is not bright, less chromatographic varieties, and a few varieties of toxic, so that its scope of application subject to certain restrictions, widely used varieties of titanium dioxide, zinc oxide, oxidation Iron red, carbon black and so on.

Organic pigments have many advantages over inorganic pigments, such as complete chromatography, bright color, high color strength and transparency, most varieties have good heat resistance, light and resistance to migration properties, and low toxicity, wide range of applications, suitable for Plastic coloring can include the following categories:

1. Application of insoluble azo and lake pigments in plastic masterbatches
Most single azo pigments such as the Han Sha series are simple in structure, low in molecular weight, heat resistant and resistant to migration. The climate is firm and poor. It is only suitable for resisting plastic products, that is, Olefin coloring.

2. Application of phthalocyanine pigments in plastic masterbatches
 (phthalocyanine blue, phthalocyanine green)
As the phthalocyanine pigments have excellent application performance, the synthesis process is simple, low cost, use is very wide. It is not only an important coloring type of ink, but also because of the bright color of paint, high color strength, transparency, excellent electrical insulation performance, especially with good chemical resistance and thermal stability, so phthalocyanine blue and phthalocyanine green is plastic coloring Important blue, green variety.

3. Heterocyclic and fused ketone pigments
For the blue color of the plastic color, almost all of the above-mentioned phthalocyanine pigments are used for the green color chromatography, and only a few different types of other structures such as yellow, orange-red, purple and azo pigments have good thermal stability and resistance to migration Sex, color strength to meet the application requirements. Most chromatographic varieties suitable for resin coloring are heterocyclic structure types.

4. Special colorants
In addition to the above-mentioned general-purpose pigments, metal powder pigments, mainly aluminum powder (silver white) and bronze powder (gold), may be used in order to give the colored resin a special color. The use of aluminum powder surface oxide film with stable characteristics, without affecting the brightness, with a variety of transparent coloring agent mix, or the use of different colors of epoxy resin coated aluminum powder, improve the gloss effect, bronze is copper and zinc Of the alloy can change the zinc content to obtain different shades.