2.2 plastic pigment heat stability tests 2.2.1 Test Equipment single-screw extruder: L / D = 24; injection molding machine. 2.2.2 Test solution quality raw pigment plastic (HDPE, PP, PS, etc.). Test concentration: 0.1% pigment concentration were pesticides colorant Which scale, 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 a single-screw extruder repeatedly extruded into uniform particles. In the injection molding machine at a certain time constant to 200 ℃, 220 ℃, 240 ℃, 260 ℃, 280 ℃, 300 ℃ temperature interval, gradually manufactured and tested model, Rating: press to be cooled for 16 hours Swatches pesticide colorant , to test swatches, color E = concentration of 3 for thermal stability. Pigment content of livestock, poultry, aquatic exterior color depends on the feed intake and cumulative. The traditional extensive farming methods, due to the longer feeding period, the animals accumulated body pigment, MSG more final appearance and color products is very pleasant, consumers are willing to accept lower prices Which pesticide colorant, product prices are high; On the contrary, due to the rapid development of modern breeding and feeding techniques, livestock and poultry. Fish and other fast growing, feeding of the product is very short, so the pigment obtained from natural food colorants accumulated very little pesticide companies, products pale, lose their appeal to consumers, price is also low. To solve this problem, it is clear the general needs help colorants. Which pesticide colorant low price, Weifang Fuyuan (certified), pesticide colorant 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.