Environmental performance. With increasingly stringent environmental regulations at home and abroad, many of the toxic products of plastic colorants made stringent requirements, the toxicity of the colorant more cause for concern. Today the United States, EU and other countries have made it clear restrictions on the use of heavy metals, including cadmium, lead, selenium and other colorants; Germany and other countries have also introduced legislation to limit the use of some aromatic amine dyes and organic pigments. At present there are a lot of toxic colorant in the production and use, to completely replace the technology still faces challenges and costs. Coloring pigment in plastics Testing Methods (1) test equipment two-roll mill roll revolution: 25 rev / min pesticide colorant products, 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, sheet thickness 0.5mm. (2) Testing of raw materials made of polyvinyl chloride resin, a colorant sales of pesticides, plasticizers, stabilizers, 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 pesticide company colorants, pigments tinting strength test can compare with its standard sample coloring power difference between the two pesticides colorants, when adjusted to both have the same coloring . Testing may also be high density polyethylene, low density polyethylene, polypropylene or the like. Price pesticide colorant, pesticides colorants, Weifang Weifang Fuyuan Fuyuan provided by the Environmental Protection Technology Co. Weifang Fuyuan Environmental Technology Limited (www.wfdafuyuan.com) (www.wfdafuyuan.com) strong, credible, Shandong Weifang other industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Weifang Fuyuan into the brilliant and you work for a better future!