Metallic pigment is the most commonly used gold and silver powders. Colored by gold or silver powder, the plastic products can be like metal products. The coloring effect of gold and silver powders can produce quite different effect due to the different degrees of thickness of particles. The finer of the particles, the stronger of the covering force. But gold powders will make polyolefin plastics accelerate light aging, so we must pay attention to it when using. Rainbow pearl series products belong to mica pearlescent pigment, made from mica sheet coated with titanium dioxide, so they have good pearl effect. As the new development of pearlescent pigments, the interfered color pearl and colored pearl are all realized through controlling the thickness of the coating of titanium dioxide.