Patent ID: 7704661

Claim:
A toner which comprises toner particles and at least a fine silica powder having been mixed by external addition to the toner particles; the toner having a weight average particle diameter of from 4.0 μm or more to 9.0 μm or less, and; the fine silica powder having been subjected to hydrophobic treatment with dimethylsilicone oil at least, and having, in particle size distribution based on volume of the fine silica powder as measured with a laser diffraction particle size distribution meter, a peak at which cumulative frequency is largest, in at least the measurement range of from 0.02 μm or more to 1,000.00 μm or less; the cumulative frequency of from 0.10 μm or more to less than 1.00 μm being 7.0% or less, and, where the cumulative frequency of from 10.10 μm or more to less than 39.23 μm is represented by A(%) and the cumulative frequency of from 39.23 μm or more to less than 200.00 μm is represented by B(%), the fine silica powder fulfilling the following conditions 1) to 3): 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 from 0.030 or more to 0.055 or less.