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Specifications

   Items                  N220     N330    N550    N660
Iodine absorption  g/kg   121±5   82±5   43±4   36±4
DBP Absorption            114±5   102±5  121±5  90±5
CTAB Surface Area,        106-116  79-87   38-46   31-39
Nitrogen Surface Area,    114-124  78-88   38-46   30-40
Tint Strength             110-120  98-108    -       -
Heating Loss % ≤          3.0      2.5     2.5     1.5
Ash %  ≤                  0.5      0.5     0.5     0.5
Tensile strength Mpa% ≥  -0.8     -1.5    -3.5    -3.5