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Carbon black is generally required in the coating dispersion 3 as follows:
First, the black paint is wet, the black - air interface into black - paint interface;
Second, carbon black was dispersed, carbon black agglomerates to be crushed aggregate;
Third, the carbon black particles stabilized. Carbon black aggregates in the paint surface adsorption resin and a surfactant, in order to maintain the quasi-stable state of colloidal particles.