Items N220 N330 N550 N660
Iodine-absorption Number, g/Kg  121?5 82?7 43 ? 6 36 ? 6  
DBP Absorption (10-5 m3/kg ) 114?5 102?7 121 ? 7 90 ? 7
Compression DBP absorption (10-5 m2/kg) 90??05 78??8 77??3 66??2
Nitrogen Surface area Absorptive(103m2/Kg) 109-129 73-93 34-50 27-43
Surface of CTAB
absorption rate
(102 m2 / kg ) 102??21 73??1 35??9 29??3
Ash Content% 0.5 75?9 39 ? 9 39 ? 9
45?m Sieve Residue,%??0.10 0.10 0.10 0.10
150?m Sieve Residue,%??0.02 0.02 0.02 0.02
Surface of He
absorption rate
( 102 m2 / kg ) 112??26 71??5 34??6 29??1
Tint Stregth( % ) 105~125 95 ~ 111  - -
Appearance Black Powder or Granular
Packing 25kg net bag, 16MT in 20??CL
Usage Its mainly used in rubber industry, and in printing ink, paint, plastic industry,
car tire tread etc.