Waterless planographic printing plate and method of plate making

Details Waterless planographic printing plate and method of plate making Waterless planographic printing plate and method of plate making

1997-03-06

1999-09-21

Chu, John S.

Radiation imagery chemistry: process, composition, or product th

Diazo reproduction, process, composition, or product

Composition or product which contains radiation sensitive...

4302711, 4302721, 4302731, 430303, 430944, G03F 7004, G03F 726

Patent

active

059552387

ABSTRACT:
A waterless planographic printing plate, wherein the waterless planographic printing plate comprises a laser-light-sensitive layer which constitute a first layer provided on a support, containing a compound (A) generating an acid by irradiating an actinic light thereto, a compound (B) converting a laser light to heat and a polymer compound (C) which is decomposed by heat under an acidic condition; and a layer which constitutes a second layer having an ink repellent surface thereon. The entire surface of the waterless planographic printing plate is exposed with ultraviolet light. The printing plate is irradiated imagewisely with an infrared laser light to heat the portion irradiated with the laser light, and at least a layer having an ink repellent surface at the portion irradiated with the laser light is removed. The present invention can provide a waterless planographic printing plate capable of laser recording with a high sensitivity and separation developing, and having a high resolving power and an excellent storability, and a method of plate making for the printing plate which is simple and accurate.

REFERENCES:
patent: 4842990 (1989-06-01), Herrmann et al.
patent: 5378580 (1995-01-01), Leenders
patent: 5631119 (1997-05-01), Shinozaki
patent: 5721087 (1998-02-01), Yokoya et al.

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