Should gem cards, gem rubber zinc oxide

 Describe rubber grade zinc oxide indirect method characteristics: high temperature oxidation of zinc ingots used, as compared to zinc slag material, small particle size, particle size uniformity, higher activity and strong dispersion capacity, fewer impurities. Uses: Rubber grade zinc oxide indirect method for radial tires, bias tires, belts, hoses, belt, shoes, latex gloves and other rubber products. Item Index YY812-1 YY812-2 YY812-3 YY812-4 Zinc oxide (dry product) (ZnO) /% ≥ 99.7 99.5 99.4 98 metal objects (as Zn) /% ≤ 0.008 0.008 None None Lead oxide (in as Pb) /% ≤ 0.037 0.05 0.14 0.18 Hydrochloric acid insoluble /% ≤ 0.006 0.008 0.05 0.1 Loss on ignition /% ≤ 0.2 0.2 0.2 0.3 Water soluble /% ≤ 0.1 0.1 0.15 0.3 105 ℃ volatile matter /% ≤ 0.3 0.4 0.5 0.6 sieve residue /% ≤ 0.1 0.15 0.2 0.3