Test methods (1) Determination of readily dispersible pigment test method: press pigment in plastic coloring Determination to take dilute PVC sheet in half, the roller surface temperature is controlled to 130 ℃, PVC sheet thickness 0.3mm, plastic mixing time 7 to 8 minutes of the film. Tabletting temperature 165 ~ 170 ℃; the tablet dwell time of 1 minute speed cold. Assessment: The following two different shear mixing conditions improve color strength calculated dispersion. Reputation among five best fertilizer colorant, a worst. Environmental performance. With increasingly strict environmental regulations at home and abroad colorant fertilizer products, many products of plastic colorants toxicity proposed strict quality requirements of fertilizer colorant colorant toxicity increasing 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. Fertilizer colorants, Weifang Fuyuan, the colorant fertilizer sales by Environmental Science and Technology Co., Ltd. Weifang Fuyuan. Fertilizer coloring agents, sales Weifang Fuyuan, fertilizer colorants are Weifang Fuyuan Environmental Technology Limited (www.wfdafuyuan.com) (www.wfdafuyuan.com) this year introduced a new upgrade, the above picture is for reference only, please call Tel This page or image on to obtain the latest information, contact: MGA.