Thus gloss bronze powder, metallic, surface cover rate, particle size and distribution of the product and other major technical indicators of the higher demand light copper powder, copper powder traditional technology has been difficult to meet modern requirements bronze powder, and therefore copper powder, copper powder-depth research and development has important practical significance. Imports of copper powder specification is divided into 200 mesh 400 mesh 600 mesh 800 mesh mesh 1500 1200 1000 mesh mesh mesh 2000 mesh 1800 Yiwu Pengfei Pigment Co., Ltd. is a professional supplier of metal pigments. Determination of copper remains Iodometry ancient bronze powder pigment, its large amount of potassium iodide, high cost, time consuming, and the problem because of the newly developed spectrophotometric copper reagent should not be the determination of high content of copper, it is necessary to research and develop 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. Copper powder retail, Pengfei pigment (online consultation), Suzhou copper powder provided by Yiwu Pengfei pigments Limited. Yiwu Pengfei Pigment Co., Ltd. (www.1688.com/company/ywpfyl.html)(www.4000881771.com) Zhejiang Jinhua, organic pigments leaders, over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness The guidelines, the maximum meet customer needs. Pengfei pigment in leadership with the staff warmly welcome all inquiries negotiations to create a better future Pengfei pigment.