| abstract |
An image forming device being excellent in cleaning property for an electrophotographic element and capable of forming a high-quality, high-resolution image. The surface free energy (Ϝ) of a photosensitive element (2) provided in the image forming device (1) to form thereon an electrostatic latent image by being exposed to a light matching image information is set to 20-35 mN/m, and the volume average particle size of toner contained in a developing agent stored in a developing unit (29) to develop an electrostatic latent image and form a toner image is set to 4-7 μm. When the Ϝ of the photosensitive element (2) is set to within a small range as the particle size of toner is reduced, even small-particle-size toner hence increased in specific surface area and largely affected by a inter-molecular force is limited in adhesion force to the surface of the photosensitive element (2) to provide a good cleaning property, whereby a cleaning property is enhanced and at the same time a high-quality image can be formed. |