Name

Grade

Whiteness
%≥

Loss on ignition(1000^οC)
%≤

Silicon dioxide
%≥

Magnesium oxide
%≥

Calcium oxide
%≤

Iron(III) oxide
%≤

Aluminum oxide
%≤

K₂O+Na₂O
%≤

talcum lump

HK-special

96.0

5.2

61.0

31.0

0.18

0.20

0.30

0.05

HK-1

90.0

6.5

60.0

30.0

0.36

0.30

0.60

0.1

HK-2

85.0

8.0

55.0

29.0

0.8

1.0

5.0

0.3

HK-3

76.0

12.0

40.0

28.0

1.5

2.5

15.0

0.5

talcum granule

HX-1

83.0

8.5

55.0

29.0

0.8

1.0

5.0

0.3

HX-2

76.0

12.0

40.0

28.0

2.0

2.5

15.0

0.5