| abstract |
An electrographic photoreceptor has an underlying layer, which is formed on a conductive support and contains metal oxide particles and a binder resin, and a photosensitive layer formed on the underlying layer. In order to provide the electrographic photoreceptor with high sensitivity and a low residual potential, the underlying layer is so formed that the volume average particle diameter, measured by a dynamic light scattering method, of the metal oxide particle in a solution dispersed in a solvent including methanol and 1-propanol mixed with a weight ratio of 7:3 is made at most 0.1 μm and the cumulative 90% particle diameter is made at most 0.3 μm. In addition, the photosensitive layer includes crystalline phthalocyanine having one or more clear main diffraction peaks at Bragg angles (2ϑ ± 0.2°) of 27.0° to 29.0° in an X-ray diffraction spectrum. |