Product Description High purity zinc sulfide powder (&ge;99.99%) This product is a high quality vacuum coating material, used forvacuum deposition(PVD), trademark anti-counterfeiting. Property Test Standard Typical Value ZnS(%) SC method >99.99% D50(&mu;m) SC method 4&mu;m-5&mu;m (Fe)ppm <0.3 (Pb)ppm <0.6 (Cu) ppm <0.1 (Ni) ppm <0.1 Detailed Photos