| abstract |
An image quality, a cleaning property, a missing dot, and a fine line reproducibility are suppressed while suppressing the unevenness of the toner particle size distribution and the smearing, residual image, blurring, etc. of the image white background due to the matching of the toner and the photoreceptor. To provide an image forming apparatus that is good and that is free from contamination during long-term use even when a high-speed printing machine is used and has excellent image stability. In an image forming apparatus comprising an electrophotographic photosensitive member having a photosensitive layer on a conductive support and a toner for developing an electrostatic charge image, the photosensitive layer of the electrophotographic photosensitive member contains phthalocyanine, and An image forming apparatus, wherein the toner for developing a charge image satisfies all of the following requirements. (1) Volume median diameter (Dv50) is 4.0 μm or more and 7.0 μm or less (2) Average circularity is 0.93 or more (3) Volume median diameter (Dv50) and particle diameter of 2.00 μm or more 3 The relationship of the number% (Dns) of toner of .56 μm or less satisfies Dns ≦ 0.233EXP (17.3 / Dv50). (4) Number variation coefficient is 24.0% or less. |