Substrate for electrophotographic photoreceptor, process for producing the substrate, and electrophotographic photoreceptor employing the substrate

A process for producing an electrophotographic photoreceptor substrate, which substrate has a groove pattern made by forming many fine grooves at least in almost the whole image formation region in the substrate surface, wherein the grooves are curved and discontinuous when the substrate surface is developed into a plane and the plane is viewed in a direction perpendicular thereto, which process comprises bringing at least one flexible material into contact with the surface of the substrate and causing the flexible material to relatively travel on the substrate surface.