ITEM (indirect)	INDEX
	Nks001	Nks002
Zinc oxide(ZnO)% ≥	99.7	99.5
Metallic metals(as ZnO) ≤	None	None
Lead oxide(PbO)% ≤	0.037	0.05
Manganese(Mn) % ≤	0.0001	0.0001
Copper Oxide(CuO)% ≤	0.0002	0.0004
Loss on ignition % ≤	0.2	0.2
105 degree volatiles%≤	0.3	0.4
Insolubles in HCL solution % ≤	0.003	0.008
Solubility in water % ≤	0.10	0.10

Index item (direct)	Rubber-1	Rubber-2	Paint-1	Paint-2	Paint-3
Zinc oxide% ≥	99.5	99.0	99.5	99.0	98.0
Lead oxide(Pbo)% ≤	0.12	0.20	­-	-	-
Cadmium oxide (Cdo)% ≤	0.02	0.05	-	-	-
Copper Oxide(Cuo)% ≤	0.006	0.007	-	-	-
Manganese(Mn) % ≤	0.0002	0.0003	-	-	-
Metallic metals(as Zn) ≤	None	None	None	-	-
Insolubles in HCL solution % ≤	0.03	0.04	-	-	-
Losses on ignition % ≤	0.4	0.6	0.4	0.6	-
Solubility in water;% ≤	0.4	0.6	0.4	0.6	0.8
Screening residues(320µm wet screen)% ≤	0.28	0.32	0.28	0.32	0.35
Moisture % ≤	0.4	0.4	0.4	0.4	0.4
Hiding power(g/m) ≤	-	-	150	150	150
Oil absorption,% ≤	-	-	18	20	20
Colour killing% ≤	-	-	100	95	95

Item (Active)	Index
	I-class	II-class
Zinc oxide(ZnO)% ≥	95-98	95-98
Moisture % ≤	0.7	0.7
Loss on ignition % ≤	1-4	1-4
Insolubles in HCL solution %	0.02	0.05
Lead oxide(PbO)% ≤	0.01	0.05
Manganese oxide(Mn) % ≤	0.001	0.003
Copper oxide(Cu)% ≤	0.001	0.003
Fineness(45µm Screening residues) % ≤	0.1	0.4
Specific surface m2/g ≥	45	35
Bulk density g/ml ≥	0.35	0.40