Pearlescent pigments are semi transparent, and in the application process, it is necessary to pay attention to their optical properties and utilize them in order to achieve good pearlescent effects. In recent decades, the application and development of the plastic industry in the world have been very rapid. In China's national economy, plastic products also occupy an important position. With the improvement and development of plastic processing methods, plastic products are becoming increasingly rich and colorful. The application of pearlescent pigments in plastics is also becoming increasingly popular. From Artificial leather, wallpaper, plastic packaging film, cosmetics, shampoo packaging, home appliance plastic parts, to artificial pearls and other plastic products, pearlescent pigments are widely used to increase attractiveness. Pearlescent pigments can be applied to almost all thermoplastic materials and some thermosetting plastics. The concentration of pearlescent pigments used in plastics depends on different application conditions.