Use dye coloring, since pigment powder evenly distributed in colored resin needed, so its good distribution, this conclusion is only for injection products, especially thick-walled products, for blown film, the other spinning products a different 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, it is completely unable to guarantee there will be "cooked" phenomenon. 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. Coloring pigment in plastics Testing Methods (1) test equipment two-roll mill roll revolution: 25 rev / min, the speed ratio of 1: 1.2 chrome plated roll. Platen press can be heated and cooled. Two stainless steel mirror panels, inner frame: square-frame, pesticide colorant products, sheet thickness 0.5mm. (2) Testing of raw materials made of polyvinyl chloride resin, plasticizers, pesticides, colorants reputation, stabilizers, pesticides colorants, titanium dioxide, a pigment composition. (3) Test Method would roll surface temperature is controlled at 160 ℃, PVC sheet thickness 0.4mm; refining plastic time: 7 to 8 minutes the film; tabletting: at a temperature of 165 ℃ ~ 170 ℃ tablet dwell time of 1 minute rapid cooling. (4) colorimetric measurement standard color value, calculated K / S value, color strength test and it can be the difference between the two standard sample coloring power comparison, when adjusted to both have the same coloring. Testing may also be high density polyethylene, low density polyethylene, polypropylene or the like. Sales pesticide colorant | pesticide colorant | Weifang Fuyuan (view) provided by Environmental Science and Technology Co., Ltd. Weifang Fuyuan. Weifang Fuyuan Environmental Technology Limited (www.wfdafuyuan.com) (www.wfdafuyuan.com) is specialized in "anti-caking agent compound fertilizer cream, liquid oil complex anti-caking agents, coloring brightener organic fertilizer," the enterprises, companies adhering to the "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: MGA.