Following are the Main Specifications of Direct Zinc Oxide 90% :-
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
|
