| 摘要 |
PURPOSE:To obtain carbon black excellent in blackness. CONSTITUTION:A carbon black having an infrared absorption spectrum (in terms of absorbance) in which the ratio of the maximum absorbance at 1670-1500cm<-1> to that at 1800-1670cm<-1> is 0.65 or greater when the baseline is the line formed by tying the absrobance at 1805cm<-1> to that at 900cm<-1>. |
