1. we are the real manufacturer of zinc oxide. 2. we have our own factory. 3.zinc oxide 99.7%/99.5%--70% 4.Direct,Indirect, 1. we are the real manufacturer of zinc oxide.2. we have our own factory.3.zinc oxide 99.7%/99.5%--70%4.Direct,Indirect, Performance: 99.5%-99.8% indirect-method ZnO is produced by an oxidation method and a calcination method. It is white powder stable at normal temperature, ...