Pigment content of livestock, poultry, aquatic color appearance depends on the feed intake and cumulative. The traditional extensive way, because of the longer feeding period, the animals accumulated body pigment, MSG more, the final product is very pleasant appearance and color, consumers are willing to accept the price of the product is also high; the contrary fertilizer colorants, due to modern the rapid development of fertilizer colorants Which breeding and rearing techniques guaranteed, livestock, poultry. Fish and other fast growing, breeding life of the product is very short, so the pigment obtained from natural feed accumulated very little fertilizer pale coloring products company, lost their appeal to consumers, the price is also low. To solve this problem, it is clear the general needs help colorants. 2.2 plastic pigment thermal stability test method 2.2.1 Test Equipment single screw extruder: L / D = 24; injection molding machine. 2.2.2 Test materials paint solution quality plastic (HDPE, PP, PS, etc.). Test concentration: pigment concentration of 0.1%, 0.05%, 0.025%, 0.005%; corresponding to titanium dioxide is 1%. 2.2.3 Test Method pigment mixture can be quantified by (2) the concentration of the single-screw extruder repeatedly extruded into uniform particles. In the injection molding machine at a certain time constant to 200 ℃ fertilizer colorants Which is good quality, 220 ℃, 240 ℃, 260 ℃, 280 ℃, 300 ℃ temperature intervals, gradually manufacturing model and test assessment: press to be Swatches After cooling for 16 hours to test swatches, color E = concentration of 3 for thermal stability. Which fertilizer colorants high credibility, Weifang Fuyuan (certified), fertilizer colorants provided by Environmental Science and Technology Co., Ltd. Weifang Fuyuan. Weifang Fuyuan Environmental Protection Technology Co., Ltd. (www.wfdafuyuan.com) (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.