Zinc Oxide Content	99.7% min	99%min	99.8%min	99.5%min
Lead Oxide Content	0.02max	0.08max	0.002 max	0.1 max
Cadmium Content	0.001max	0.001 max	0.0001 max	0.002 max
Copper Content	0.0002max	0.0002 max	0.0001 max	0.0003 max
Manganese Content	0.0003max	0.0003 max	0.0002 max	0.0004 max
Zinc %	none	none	none	none
Water solubles	0.02max	0.04 max	0.02 max	0.1 max
Loss on Ignition	0.08max	0.1 max	0.04 max	0.2 max
Insoluble in Acid	0.04max	0.04 max	0.003 max	0.05 max
Moistnre content	0.3max	0.3 max	0.02 max	0.4 max
Residue on 320meshes	0.05 max	0.05 max	0.04 max	0.08 max