| 摘要 |
PURPOSE:To ensure photographic characteristics and to obtain a good image for a long term by dispersing a specified phthalocyanine photocondutive material into a binder resin, employing it as an electrophotographic sensitive body, and controlling time and destaticization under a specified electric field intensity. CONSTITUTION:A specified alpha-type crystal form phthalocyanine pigment is obtained by mixing phthalocyanine, and one of phthalocyanine derivs. substd. on the benzene ring by at least one of electron attractive groups of nitro, cyano, halogen, etc., with an inorg. acid capable of forming a salt with phthalocyanine, and then, diluting the mixture with water or a basic substance to precipitate it. The phthalocyanine compd. thus obtained is dispersed into a binder resin, and a photoconductive layer is formed by coating with it. Electric field intensity per 1mum of the photoconductive layer in electrostatic charging is set to about 30-50V, a time length from imagewise exposure of an electrophotographic sensitive body to development is controlled to about 0.1-0.4sec, and destaticization of said body is carried out under an illumination of about 20-150lux.sec. |
