Coating fluid for forming undercoat layer and electrographic photoreceptor having undercoat layer formed by applying said coating fluid

摘要

To provide a coating fluid for forming an undercoat layer having high stability, a high quality and long-life electrophotographic photoreceptor capable of forming a high quality image in various environments, with which image defects such as black spots or color spots hardly occur, an image forming apparatus using such a photoreceptor, and an electrophotographic cartridge using such a photoreceptor.;A coating fluid for forming an undercoat layer of an electrophotographic photoreceptor , comprising an electroconductive substrate, a binder resin and metal oxide particles having a refractive index of at least 2.0 formed on the electroconductive substrate, characterized in that of a liquid obtained by diluting the coating fluid with a solvent mixture of methanol and 1-propanol in a weight ratio of 7:3, the difference between the absorbance to a light having a wavelength of 400 nm and the absorbance to a light having a wavelength of 1,000 nm, is at most 1.0 (Abs).