Index Item

Index

 Type I  

               Type II

Super Grade

Grade1

Qualified Grade

Super Grade

Grade1

Qualified Grade

Zinc oxide   %≥

99.70

99.50

99.40

99.70

99.50

99.40

Metallic metals (as Zn) %≤

None

None

0.008

None

None

0.008

Lead oxide (as pb)     %≤

0.037

0.05

0.14

-

-

-

Manganic oxide (as Mn) %≤

0.0001

0.0001

0.0003

-

-

-

Copper oxide (as Cu)   %≤

0.0002

0.0004

0.0007

-

-

-

Insolubles in HCL solution%≤

0.006

0.008

0.05

-

-

-

Losses on ignition      %≤

0.2

0.2

0.2

-

-

-

Screening residues (through 45µm mesh)   %≤

0.10

0.15

0.20

0.10

0.15

0.20

Soluble matters in Water %≤

0.10

0.10

0.15

0.10

0.10

0.15

Volatile matters at 105°C %≤

0.3

0.4

0.5

0.3

0.4

0.5

Oilabsorption  g/100g  ≤

-

-

-

14

14

14

Colour (compared with standard specimen)

-

-

-

Similar

Few

Little

Colour killing ( Compared with standard specimen)
          %≥

-

-

-

100

95

90