| 摘要 |
Carbon black, of the category of hard carbon blacks, which have a specific surface area by adsorption of nitrogen of 65 to 84 m<2>/g and a DBP absorption index from 100 to 150 ml/100 g and which corresponds to the conditions respectively represented by the following formulae (1), (2) and (3): <IMAGE> in which N2SA is the specific surface area by absorption of nitrogen (m<2>/g), TINT is the specific colouring power (%), Bn is the black value (%), DELTA Dst (nm) is the difference between two Stokes diameters each obtained at a frequency of 50% of the maximum frequency on a distribution curve of the Stokes diameter of the aggregates, Dst (nm) is the Stokes diameter of the maximum frequency on the distribution curve of the Stokes diameter of the aggregates, and IA is the iodine adsorption index (mg/g).
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