Patent ID: 7378205

Claim:
An electrophotographic photosensitive member comprising a support and a photosensitive layer on the support, wherein a surface of the electrophotographic photosensitive member has a universal hardness (HU) in a range of between 160 and 200 N/mm 2 and an elastic deformation ratio in a range of between 50 and 65%, wherein the universal hardness (HU) of the surface of the electrophotographic photosensitive member and the elastic deformation are measured at a temperature of 25° C. and a relative humidity of 50% by bringing a Vickers square cone diamond indenter with an angle between opposite faces of 136° into abutment with the surface of the electrophotographic photosensitive member, continuously applying a load to the indenter with a final value of the load applied being 6 mN, employing a time period during which the indenter is maintained under the final value of the load of 6 mN of 0.1 second and directly reading an indentation depth under the load.