PURPOSE: To obtain a composite type electrophotographic sensitive material extremely excellent in durability by using ≥2 layers contg. an electrostatic charge transfer substance, different from each other in the content ratio of said substance to a binder resin.
CONSTITUTION: A charge generating layer is formed by finely pulverizing a charge generating substance alone or together with a binder resin, etc. in a ball mill or roll mill or the like, mixing them with a solvent to prepare a liquid coating material, and applying it. Charge transfer layers e.g., in the case of 2 layers, the first layer is formed by using a coating material having a weight ratio of a charge transfer substance to a binder resin of 1:(0.25W2), and the surface layer of the photosensitive material, i.e., the outermost layer is formed by using a coating material having said ratio of 1:(1W8) to obtain an intended photosensitive material.
OGATA MASAJI
KOKADO HIROYOSHI
NARAHARA TOSHIKAZU
ISHIKAWA TETSUO
Next Patent: COMPOSITE TYPE ELECTROPHOTOGRAPHIC SENSITIZED PLATE