Pigment is the raw material of masterbatch. The quality of pigments directly affects the quality of masterbatch, and the quality of masterbatch directly affects the quality of plastic products. In other words, the requirements of plastic products for color masterbatches, that is, the requirements of color masterbatches for pigments. This includes safety, heat stability, light resistance and weather resistance, acid and alkali resistance, migration resistance, chemical resistance, etc. However, there has been no standard for pigments for masterbatch, and the standard for paints has always been used.