Use dye coloring, as evenly distributed pigment powder colored resin needed, fertilizers colorant, so its good distribution, this conclusion only for injection products, especially thick-walled products, fertilizers colorant companies, For blown film, spinning products is another matter. Because the toner is generally not been pretreated, when it is mixed with the resin, the alone from the extruder feed port, a screw, to spout such a distance and in such a short time mixed plastics, to make pigment powder Molecular and colored pigment molecules join hands well - fully integrated fertilizer colorant manufacturers, is completely unable to guarantee sales, there will be "cooked" phenomenon colorant produce fertilizer. However, this "cooked" phenomenon in the thick product will be masked out, blown film, spinning products is obvious. So which method is still colored masterbatch based. Type of plastic colorant type of plastic colorant, its physical form is divided into four categories: powdered colorants - Toner; colorant paste - paste; liquid colorant; solid state colorant - masterbatch. Which is widely used as a solid powdered colorants and colorants. Therefore, for the other two kinds of coloring agents are not discussed herein. Ensure 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.