... the system ointment, zinc paste, plaster, etc ApplicationZinc oxide is used in rubber and tire industry are essential ... ZnO 95%ZnO 90%Lead oxide (PbO)% ≤0.120.21.03.04.0Cadmium oxide (CdO) % ≤0.020.05------Cupric oxide (CuO) % ≤0 ... Zinc Oxide Grades : Indirect process Zinc Oxide, Direct Process Zinc Oxide, Calcined Zinc Oxide, Feed Grade Zinc Oxide, Pharmaceutic Zinc Oxide, nanometer Zinc Oxide, etc ...