Rubber type

Coating type

Top-grade

First grade

Top-grade

First grade

Appearance

White powder

Zinc oxide(Zn0 calculating as dry material),W/%                ≥

99.7

99.5

99.7

99.5

Metal  content(as Zn),W/%   ≤

NO

NO

NO

0.008

Lead oxide(as Pb),W/%       ≤

0.008

0.05

0.010

-

Manganese's oxide(as Mn ),W/%≤

0.0001

0.0001

0.0001

-

Cupric oxide(as Cu ),W/%     ≤

0.0002

0.0002

0.0002

-

Cd,W/%                      ≤          

0.002

0.005

0.010

_

Fe,W/%                      ≤

0.005

0.010

0.010

_

As,W/%                      ≤

_

_

_

_

Alkalinity,ml                   ≤

_

_

_

_