Carbon black

                               Executive Standard : GB3778-2003

Items of Test

N220

N330

N550

N660

Iodine Absorption                       g/kg

122

83

43

36

DBP Absorption                   10-5m3/kg

144

103

122

92

DBP Absorption of Compressed Sample

10-5m3/kg

98

88

86

73

CTAB Adsorption Surface Area       103m2/kg

109

81

42

35

STSA                             103m2/kg

107

75

39

34

Nitrogen Surface Area              103m2/kg

117

78

39

35

Pigmentation Intensity                     %

116

105

Heating Loss                            %≤

1.5

1.5

1.0

1.0

Ash                                    %≤

0.2

0.2

0.2

0.2

Grit Mesh 45#                            ≤

0.042

0.042

0.042

0.042

Impurity

None

None

None

None

Pumping Density                      kg/m3

362

388

370

448

300% Elongation Stress                 Mpa

-2.2

-1.0

-1.0

-0.4

Test Conclusion

First Grade

First Grade

First Grade

First Grade