Test items				Indirect method	Direct method
Zinc oxide(counted by dried substances )%			≥	99.7	99.5
Metal ( Zn ) %			≤	None	None
Lead oxide( Pb ) %			≤	0.037	0.12
Manganese oxide ( Mn) %			≤	0.0001	0.0002
Cupric oxide ( Cu ) %			≤	0.0002	0.006
Burning decrement %			≤	0.2	0.4
105℃ volatile substances %			≤	0.3	0.4
Water dissoluble %			≤	0.1	0.4
Hydrochloric indissoluble substance %			≤	0.006	0.03
Sieve Residue %			≤	0.1	0.28
Lead oxide(PbO)       %			≤	--	0.12
Package: woven bag, inner with plastic bag.25KG/bag