| abstract |
(57) [Problem] To reversely develop an electrostatic latent image formed on a positively charged amorphous silicon-based photoreceptor, a toner component or the like is filmed on the surface of the amorphous silicon-based photoreceptor. And the toner is appropriately charged in the developer so that a good image can be stably obtained over a long period of time. SOLUTION: In a developer used for reversal development of an electrostatic latent image formed on a positively charged amorphous silicon-based photoconductor, at least a positively charged toner, an aminosilane coupling agent and an aminosilicone oil And a first inorganic fine particle having an average particle diameter in the range of 0.1 to 3 μm which has been subjected to surface treatment with at least one type of surface treatment agent selected from the group consisting of 0.1 to 3 μm. Second inorganic fine particles in the range of 005 to 0.02 μm are contained. |