The colorants that are used in the Plastic Industries can be both the dyes and pigments. Both dyes and pigments exhibit color through the process of visible light absorption and scattering. Typically color formulations generally have four colorants. Black and white are used basically to control the value and Chroma, while two colored pigments or dyes are applied to establish the Hue.
Dyes that are used in the plastics industry must be very strong, show good heat stability and be transparent. Typically the dyes are used to tint or shade a resin. In the plastics industry dyes are limited in use, as such they can be used for only a selected number of resins. Pigments used in this industry can be organic or inorganic. While pigments offer more choices to the manufacturers due to its opacifying ability, broader chroma range, and better heat stability for most of the resins. Pigments are generally dispersed within a resin matrix, while dyes solubilize in the resin. Titanium Dioxide is a pigment that has a wide use in Plastics industry. It is used to make the plastics more whiter, brighter and durable.
Dyes or Pigments ???
|Phthalocyanine Pigments Colorants from Qualitron Chemicals|
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