Lithopone technical grade                   

Standard:  (GB/T1707-1995)

       Item

         B301

B302

B311

High grade

1^st grade

High grade

1^st grade

High grade

1^st grade

Total amount of zinc (calculated as zinc sulpide and barium sulfate) %  ≥

99%

99%

99%

99%

99%

99%

Total amount of Zinc(calculated as zinc sulpide) %  ≥

28

28

28

28

30

30

Zinc oxide , %  ≤

    0.6

     0.8

    0.3

     0.3

    0.3

    0.3

Valatile matter at 105 Centigrade, % ≤

    0.3

     0.3

    0.3

     0.3

    0.3

    0.3

Soluble in water, % ≤

    0.4

     0.5

    0.4

     0.5

    0.3

    0.4

Residue on sieve(63um) , % ≤

   0.1

     0.1

    0.1

     0.1

    0.1

    0.1

Alkalinity of the aqueous extract

  neutrale

neutrale

   neutrale

    neutrale

   neutrale

   neutrale

Oil obsorption value (g/100g pigment) ,≤

   14

  14

    11

     11

    10

    10

Achromic power (compare with the standard sample. ),%  ≥

   105

  100

    105

     100

    105

    100

Hiding power((compare with the standard sample. ),%  ≥

   100

100

    100

     100

    100

    100