| 摘要 |
PURPOSE:To obtain a printing plate of high sensitivity by forming an electrostatic printing plate having a photosensitive layer composed of a phthalocyanine (PC) pigment, and an amt. of ZnO and ZnS at least more than PC by wt., and using an ink receptive toner. CONSTITUTION:A photosensitive body 3 is obtained by forming a photoconductive layer 2 prepared by dispersing into a binder resin, a PC pigment, and ZnO and ZnS in an amt. at least more than that of PC by wt. on a conductive substrate 1. The photosensitive body 3 is electrostatically charged and exposed to semiconductor laser beams 4 modulated with an electric signal, and developed with an ink receptive toner. The PC pigment is enumerated as follows: X-type (alpha-type, beta-type) metal-free PC; epsilon-type (alpha-type, beta-type) copper PC; vanadyl PC; newly developed and finely pulverized PC deriv. treated by acid pasting and having an electron attractive group, such as nitro.
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