Zinc oxide

Key Attributes.

Direct zinc oxide 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