| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner, developer, process cartridge and device for image formation to form an image of high quality without being influenced by the environment in the development of an electrostatic charge image. SOLUTION: The developer for development of electrostatic charge images used for the device for image formation contains a toner for development of electrostatic charge images having toner particles containing a binder resin and magnetic fine powder internally added and having 7.5 to 10.5 μm weight average particle size and 1.1 to 1.3 true specific gravity, and also contains a resin-coated magnetic carrier having 40 to 80 μm weight average particle size and 6.0 to 8.0 true specific gravity. The process cartridge 13 is attached to the device for image formation, and the process cartridge includes an electrifying means 1, a developing means having a developing sleeve 5 and a doctor blade 14, and a cleaning means 12 to recover the toner, the developing sleeve 5 and the doctor blade 14 are disposed leaving a 1.0 to 2.5 mm space between them and the photoreceptor drum 2 and the developing sleeve 5 are disposed leaving a 1.0 to 3.0 mm space between them. |
