Production plating silver plate / silver plate processing / silver plate production

My company sells a variety of silver material, high purity plating silver plate, inlet plating silver plate, (silver plated hardware, LED stent silver, silver-plated communications equipment, jewelry, silver-plated), GB silver plate on the 1st 2 on the 3rd Categories silver by chemical composition is divided into three grades: IC-Ag99.99, IC-Ag99.95, IC-Ag99.90. 3.2.1 Chemical composition The chemical composition of silver should be in accordance with Table 1. Table ingredient silver content (mass fraction) of not less than the impurity content (mass not greater than) Cu Bi Fe Pb Sb Pd Se Te sum of impurities IC-Ag99.99 99.99 0.003 0.0008 0.001 0.001 0.001 0.001 0.0005 0.0005 0.01 IC-Ag99.95 99.95 0.025 0.001 0.002 0.015 0.002 - - - 0.05 IC-Ag99.90 99.90 0.05 0.002 0.002 0.025 - - - - 0.10 Note 1: IC-Ag99.99, IC-Ag99.95 grade silver content is 100% minus impurities table Found mass fraction of income. IC-Ag99.90 grade silver content is measured directly. Note 2: The lead system recovery of silver, IC-Ag99.99 grades of lead content may not be greater than 0.001%. Quality assurance, welcome to consult the discussion.