200 mesh copper powder: fly gold, gold and copper powder pigment printed fabric for fast printing. Features: high light, strong metal. 400 mesh copper powder: Flying gold, gilded, golden bronze powder printed fabric, also suitable for screen printing, wallpaper, paint and incorporated into plastics. Features: high light, strong metal. 600 mesh copper powder: Flying gold, gilded, gold fabric printing, screen printing, coating and other handicrafts. Features: light and high copper powder retail, strong metal. Yiwu Pengfei Pigment Co., Ltd. is a professional supplier of metal pigments. Determination of copper is still the old iodimetry its large amount of potassium iodide, high cost, time consuming, and the newly developed spectrophotometric problem because copper reagent should not be the determination of high content of copper, it is necessary research, development of new chromogenic reagent. The authors try acetic acid - sodium acetate buffer solution, pH control, as chromogenic agent ethylene diamine tetra acetic acid disodium salt (EDTA), the determination of copper powder of high copper content, while taking advantage of EDTA masking zinc. Brass powder _ _ Dandong copper powder paint provided by Yiwu Pengfei Pengfei pigments Limited. Yiwu Pengfei Pigment Co., Ltd. (www.1688.com/company/ywpfyl.html)(www.4000881771.com) strong, credible, Jinhua in Zhejiang organic pigment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Pengfei into the brilliant pigment and you work for a better future!