Colorants mainly divided two kinds of pigments and dyes. Pigments can be divided according to the structure of organic and inorganic pigments. Dyes are available for most solvents and organic compounds are dyed plastic, the advantages of low density, high tinting strength, good transparency waterborne colorant, but it is generally small molecular structure, migration prone coloring. By source points, the colorant can be divided into two categories: the latter as a natural coloring agent coloring finished two for synthetic colorants. Synthetic colorants mainly carotenoids. As β- apo -8- carrot aldehyde (C30H40O) or β- A - Park -8- carotenoid ester (C32H44O) and lemon yellow pigment (C33H44O), cantharidin, Gary red, yellow Gary, exposed Kangding. Oily coloring agents, coloring agents, Weifang Fuyuan provided by Weifang Fuyuan Environmental Technology Limited. Weifang Fuyuan Environmental Protection Technology Co., Ltd. (www.wfdafuyuan.com) strong, credible, Shandong Weifang other industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Weifang Fuyuan and you hand into the brilliant, for a better future!