Appearance ( compared with standard sample ) with standard standard standard

Purity ( zinc oxide ) of > 98 95 90

Metal zinc of≤no no no

Lead oxide of≤ 0.15 0.3 1

Manganese of less than 0.0005.

Copper oxide of less than 0.006.

Hydrochloric acid insoluble substance of less than 0.02 0.03 0.10

Ignition charge 0.5 0.6 0.7

Residue on sieve ( 200 mesh) of less than 0.1 0.2 0.3

Water soluble salts of≤ 0.30 0.40 1

Covering power / ( g/m )≤ 100110120

The oil absorption value of less than 202020

Tinting strength of less than or equal to 100 + 3100 + 3100 + 3

Cadmium oxide of≤ 0.05 0.05 0.1