... factory 5.Indirect process Product name: zinc oxide 99.7% - Indirect Zinc oxide: 99.7%, etc. Zinc Oxide: White hexagonal crystal ... additives, catalysts, magnetic materials and etc. Processing Method: Heat zinc ingot to 1000 to have it melted and gasified, and then ... oxide is obtained. Specification: Index zinc oxide Industry Grade ZnOZnO , %≥99.7%PbO , %≤0.08CuO , %≤0.0001Mn , %≤0.0002As, %≤NoneZn , ...