Items  Specificaton  N220  N330  N550  N660 Loding Absorption Number(g/Kg)  114-128  77-87  39-47  32-40 Absorption Value of DBP (10 -5 M3 /Kg)  109-119  97-107  116-126  85-95   Sample DBP (10 -5 M3 /Kg)  95-105  83-93  83-93  71-79 Adsorptive Specific Surface Area of CATB ( 103M2/Kg)  106-116  77-87  38-46  32-40 Adsorptive Specific Surface Area of Nitrogen (103M2 /Kg)  114-124  78-88  38-46  30-40  Tinting Strenth%  110-120  98-108  ---  ---  Heating Loss  2.5%Max  2.5%Max  1.5Max  1.5Max  Ash Content  0.5%Max  0.5%Max  0.5%Max  0.5%Max Tensile Strength  -0.5MPa Min  -0.5MPa Min  -3.5MPa Min  -3.0MPa Min  300% Extending Stress  -1.5 ±1.0 MPa  1.0 ±1.0 MPa  1.0 ±1.0 MPa  2.5 ±1.0 MPa 45μm Sieve Residue  0.10%Max 0.10%      Max  0.10%Max  0.10%Max