Item

Standard

Environment prot grade

Industry
top grade

Industry
one grade

Eligibility
product

Zinc oxide(ZnO) ≥ ,%

99.8

99.7

99.5

99.4

Hardware (base on Zn) ≤ ,%

None

None

None

0.008

Lead oxide (base on Pb) ≤ ,%

0.0050

0.037

0.050

0.14

Oxide of mangan (base on Mn) ≤ ,%

0.0001

0.0001

0.0001

0.0003

Cupelric oxide (base on Cu) ≤ ,%

0.0002

0.0002

0.0004

0.0007

Muriatic acid insoluble substance ≤ ,%

0.004

0.006

0.008

0.05

Loss on ignition ≤ ,%

0.10

0.20

0.20

0.20

Residue on sieve (45um mesh) ≤ ,%

0.008

0.10

0.15

0.20

Hydrotrope ≤ ,%

0.008

0.10

0.10

0.15

105 Volatile ≤ ,%

0.25

0.30

0.40

0.50

Item

Standard

[I]

[II]

[III]

Zinc oxide(ZnO) ≥ ,%

99.5

99

98

Hardware (base on Zn) ≤ ,%

None

None

None

Lead oxide (base on Pb) ≤ ,%

0.12

0.2

Cadmium oxide (base on Cd) ≤ ,%

0.02

0.05

Oxide of mangan (base on Mn) ≤ ,%

0.0002

Cupelric oxide (base on Cu) ≤ ,%

0.006

Muriatic acid insoluble substance ≤ ,%

0.03

0.04

Loss on ignition ≤ ,%

0.4

0.6

Hydrotrope ≤ ,%

0.4

0.6

0.8

Residue on sieve (320um ) ≤ ,%

0.28

0.32

0.35

Moisture ,≤ %

0.4

0.4

0.4

Hiding power g/m 2 ,≤ %

150

150

150

Oil absorption(g/100g) ,≤ %

18

20

20

Colouring power ,≥ %

100

95

95