ELECTROPHOTOGRAPHIC PLANOGRAPHIC PRINTING PLATE AND DEVELOPING METHOD THEREFOR

Japanese Patent JP3403518

B2

PURPOSE: To obtain a printing plate having excellent water resistance and mechanical strength which enables formation of a uniform image and is suitable for direct power supply development by forming a back layer in such a manner that the outermost layer and the inner layer have specified surface resistivity.
CONSTITUTION: The back layer consists of at least an outermost layer having high surface resistivity and an inner layer having low surface resistivity. The surface resistivity of the outer layer ranges 1×1010 to 1×1014Ω, preferably, 1×1010 to 1×1013Ω, and more preferably 1×1010 to 1×1012Ω. The surface resistivity of the inner layer ranges <1×1010, preferably between ≥1×105Ω and <1×1010Ω, and more preferably 1×106 to 1×109Ω. The back layer consists of at least two layers, and the inner layer has low resistance and the outermost layer has higher resistance than that above. By forming the inner layer of low resistance, development by direct power supply method can sufficiently be possible even when a layer having rather high resistance is formed on the inner layer. Thereby, the plate has excellent mechanical strength and water resistance and a uniform image can be formed while merits of the direct power supply development are made use of.

Masayuki Dan
Takao Nakayama

JP22507794A

May 06, 2003

September 20, 1994

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Fuji Photo Film Co., Ltd.

G03G5/10; G03G13/10; G03G13/28; G03G15/00; G03G15/10; (IPC1-7): G03G13/28

JP5958443A
JP1260463A
JP284665A
JP2132464A
JP56018A
JP56036A

Shohei Oguri (8 outside)

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