Plastic colorant type of plastic colorant colorants kind of fertilizer, with its physical form is divided into four categories: powdered colorants - Toner; colorant paste - paste; liquid colorant; solid state colorant - color mother. Wherein the colorant fertilizer products, widely used is a powdered toner and solid state colorant. Therefore, for the other two kinds of coloring agents are not discussed herein. Animal itself can not synthesize pigment. The study also found that only oxygen-containing functional groups (such as hydroxyl, acyl, keto, etc.) carotenoids (carotenoids) classes in the livestock, poultry, aquatic products only within the coloring effect. Quality fertilizer colorant, Weifang Fuyuan (certified), fertilizer colorants provided by Environmental Science and Technology Co., Ltd. Weifang Fuyuan. Weifang Fuyuan Environmental Technology Limited (www.wfdafuyuan.com) (www.wfdafuyuan.com) Shandong Weifang, other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. In Weifang Fuyuan leadership with the staff warmly welcome all inquiries negotiations to create Weifang Fuyuan better future.