Coloring agents, also known as food colors, food coloring for the main purpose is to make the food given to improve the color and the color of the food substance. The most commonly used food coloring in the world there are more than 60 kinds of fertilizer manufacturers colorants, China allows the use of 46 species, divided into two groups according to their origin and nature of food colorants and synthetic natural food colorants. As people on food additives, pesticides increase safety awareness coloring agents, to develop natural, nutritious and versatile natural colorants has become the ease with polymers and other additives, colorants direction of development of organic pigment migration (especially plasticized agents and softeners) species have a great relationship. Experiments show that, in general, organic acid salts mobility is relatively small; the higher molecular weight is smaller than the lower mobility. Heat resistance. Excellent thermal stability as an important indicator of plastic colorants fertilizer colorants, most heat-resistant inorganic pigments are better, and can basically meet the requirements of plastic processing, and organic colorants thermal performance is poor. Colorants fertilizer manufacturers _ 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.