Analysis of plastic coloring - What are the white pigments often used in the coloring process?

(1) Titanium Dioxide: Also known as titanium dioxide, it is the main white variety used in inks, coatings and plastics.

(2) Zinc Oxide: Zinc Oxide, also known as zinc white and zinc oxide powder, has a molecular formula of ZnO, a melting point of 1720 ° C, and a refractive index of 1.92-2.00. Zinc oxide is often used for rubber coloring and also for plastic coloring, such as aBS, polystyrene.

(3) Zinc antimony white: Zinc antimony white, also known as lithopone, is a mixture of zinc sulfide and barium sulfate. The molecular formula can be written as ?ZnS+BaSO4. Among them, the content of zinc sulfide is 15, 30, 40, 50 and so on. Zinc bismuth white can be formulated to be good white, and its hiding power is relatively strong, between zinc oxide and titanium dioxide. However, due to the wide application of titanium dioxide with superior performance in plastic coloring, the application of zinc antimony is greatly limited.

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