Abstract: An electrophotographic photoreceptor includes an electrically conductive substrate, and a laminate-type photosensitive layer formed on the electrically conductive substrate. An allowable range of a charging voltage Vx to be applied to the electrophotographic photoreceptor by a charging device is V0?150?Vx?V0+150, and an electrostatic capacitance per unit area of the electrophotographic photoreceptor is 90 pF/cm2 or more. VO is an initial charging voltage applied to the electrophotographic photoreceptor. Also, an image forming apparatus and an image forming cartridge can be provided with the electrophotographic photoreceptor.

Abstract: An electrophotographic photoconductor in which a surface layer of a photosensitive layer or an overcoat layer has a glass transition temperature Tg greater than 100° C. and a hardness greater than 0.22 GPa. An electrophotographic cartridge and an electrophotographic imaging apparatus include the electrophotographic photoconductor. Flipping-over of a cleaning blade that comes into contact with the electrophotographic photoconductor may be effectively suppressed or prevented, the degree of freedom in terms of cleaning blade selection may be increased, and the possibility of causing high-frequency noise due to friction may be reduced.