Indexes	GRADE 1	GRADE 2	GRADE 3
Appearance (compared with the standard kind)	Meet standards	Meet standards	Meet standards
Purity(zinc oxide)/%≥	98.0	95.0	90.0
Metallic zinc/%≤	none	none	none
Lead oxide/%≤	0.15	0.3	1.0
Manganese/%≤	0.0005	---	---
Copper oxide/%≤	0.006	---	---
Hydrochloric acid insoluble substances /%≤	0.02	0.03	0.10
Loss on ignition	0.5	0.6	0.7
Screen residue (200 mesh)/%≤	0.1	0.2	0.3
Water—soluble salt/%≤	0.30	0.40	1.0
Covering property (g/m)≤	100	110	120
Oil Absorption/%≤	20	20	20
Color strength/%≤	100±3	100±3	100±3
Cadmium Oxide/%≤	0.05	0.05	0.1