| abstract |
A method of developing in which even when the surface roughness (Rz) of development sleeve is altered and when use is made of an amorphous silicon photoreceptor, efficient flight of a magnetic one-component toner from the development sleeve to the photoreceptor is carried out to thereby attain excellent image quality, etc.; and a development processor utilizing the method. There are provided a method of magnetic one-component jumping development and a development processor utilizing the method, wherein use is made of a toner containing 2.5 to 10.0 vol.% of toner of 0.92 to 0.98 conglobation degree and ≤5.04 μm average particle diameter, which toner has a center particle diameter, as calculated from a volume basis particle size distribution, of 6.0 to 7.8μm, and further wherein use is made of a magnetic one-component toner which providing that A refers to the amount of toner per area of toner images, satisfies the formula of relationship: 0.6 mg/cm2 ≤ A ≤ 0.9 mg/cm2 (1). |