| 摘要 |
A toner is provided which has toner particles and a fine silica powder mixed by external addition to the toner particles. The toner has a weight average particle diameter of 4.0 to 9.0 mum. The fine silica powder is subjected to hydrophobic treatment with dimethylsilicone oil, and has, in particle size distribution based on volume, a peak at which cumulative frequency is largest, in the measurement range of 0.02 mum to 1,000.00 mum; the cumulative frequency of 0.10 mum to less than 1.00 mum being 7.0% or less, and, the fine silica powder fulfills the following conditions: 1) A+B>=93.0; 2) 0.45<=A/B<=6.00; and 3) the value of [(carbon content of the treated fine silica powder)/(BET specific surface area of fine silica powder before hydrophobic treatment)] is 0.030 or more to 0.055 or less.
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