Patent ID: 7693453

Claim:
An image forming apparatus, comprising: an electrophotographic photoreceptor provided with a photosensitive layer that is exposed to light corresponding to image information for formation of an electrostatic latent image; developing means for developing the electrostatic latent image and forming a toner image by supplying a toner included in a developer onto the surface of the photosensitive layer itself of the electrophotographic photoreceptor; transfer means for transferring the toner image to a transfer material serving as a recording medium; and cleaning means for eliminating residual toner particles left on the surface of the electrophotographic photoreceptor after the toner image is transferred to the transfer material, wherein the toner comprises a bonding resin, a coloring agent, a wax, and an electrical charge control agent, and further the toner contains a coloring agent comprised of 1 to 10 parts by weight of magnetite with respect to 100 parts by weight of the resin, the toner is manufactured by crushing the melt-kneaded mixture of said bonding resin, coloring agent, wax, electrical charge control agent, and magnetite, the photosensitive layer consists of a charge generating layer containing a charge generating substance and a charge transporting layer containing a charge transporting substance thereon, and the toner is supplied on the surface of the charge transporting layer, a volume average diameter of the toner particles included in the developer is 4 μm or larger but 7 μm or smaller, and a surface free energy (γ) on the surface of the photosensitive layer of the electrophotographic photoreceptor is 20 mN/m or more but 35 mN/m or less.