Any substance can show design requires color substances called colorants. It can be an organic or inorganic colorant ingredient, and may be natural or synthetic. China allows the use of synthetic pigments include: amaranth, carmine, erythrosine, new red, lemon yellow, sunset yellow, indigo, light blue, as well as to enhance the water-soluble acidic pigments in oil dispersion of various pigments . China allows the use of natural pigments are: beet red, lac red, more orange, red pepper, red rice and other 45 kinds of red. Variety of different resins, the chemical structure of the plastic, during the molding process require different heating temperatures (above the softening point) offer a colorant, the temperature will directly affect the choice of the coloring agent, coloring at a predetermined temperature so as Under the distinct color change does not occur, the characteristics of the resin structure different colorants market, requirements are not the same colorant, Table 1 is a resin molding temperature and plastic processing requirements of the colorant. Further some other resin processing temperature, respectively, a fluorine resin, 350 ℃; acrylic resin, 180-200 ℃; silicone resin, 180 ℃; phenolic resin, 150-160 ℃; epoxy resin, 150 ℃; cellulose 180 ℃ and other plastics. Oily colorants | Weifang Fuyuan (certified) | colorants provided by Environmental Science and Technology Co., Ltd. Weifang Fuyuan. Weifang Fuyuan Environmental Protection Technology Co., Ltd. (www.wfdafuyuan.com) Shandong Weifang, the other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Weifang Fuyuan leadership with the staff warmly welcome all inquiries negotiations to create Weifang Fuyuan a better future.