The method is characterized by direct dye coloring additives by adding an appropriate amount of powdered toner (pigment or dye) of colored plastic particles, also known as dry coloring. The advantage is good dispersion, low cost, small-batch operation. Because it obviates the other colorants, such as masterbatch, paste and other process human and material resources consumption, and thus low cost fertilizer sales colorant, buyers and sellers from the restriction. Masterbatch manufacturer can not do 1 ~ 2kg, but the quality of the toner can be specified as required, preparation is very convenient. Use colorant dye coloring fertilizers, compared to other granulation colored, resin processed through a small degradation, helps to reduce the aging of plastic colorant fertilizer companies, to increase its service life. Organic pigments are mainly black, azo pigments, phthalocyanine, quinoline ketone, isoindolinone, anthraquinone, thioindigo pigments and various chemical fertilizers colorant products, wherein the carbon black is the most common use of black pigment It has a cheap color fastness, dispersion, and the advantages of good flowability of the plastic while it's still impart electrical conductivity and UV degradation filling good climate and so on. Ideal colorants may make many demands, such as want it colorful, coloring force, easily dispersed without being aggregated in plastics, high heat resistance, but has no effect on the flow of plastic, does not affect the resin's resistance to aging and Its other performance, weather Fast and cheap, non-toxic, and so on. Colorant fertilizer products | fertilizer colorant | Weifang Weifang Fuyuan Fuyuan provided by the Environmental Protection Technology Co., Ltd. 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!