METHOD FOR PRODUCING PLANOGRAPHIC PRINTING PLATE

PROBLEM TO BE SOLVED: To provide a method of producing a planographic printing plate, the planographic printing plate providing excellent developability while preventing time-dependent generation of development wastes, even when an alkaline developer with a relatively low pH is used. SOLUTION: The m...

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1. Verfasser:	AOSHIMA NORIO
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED THEREFOR CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY MATERIALS THEREFOR ORIGINALS THEREFOR PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method of producing a planographic printing plate, the planographic printing plate providing excellent developability while preventing time-dependent generation of development wastes, even when an alkaline developer with a relatively low pH is used. SOLUTION: The method of producing a planographic printing plate includes: an exposure step of imagewise exposing a positive-working planographic printing plate precursor which has an image recording layer on a support; and a development step of developing an imagewise exposed positive-working planographic printing plate precursor using an alkaline aqueous solution which contains an anionic surfactant and has a pH of 8.5-10.8, in this order. The image recording layer has: a lower layer containing (A) a water-insoluble and alkali-soluble resin and (B) an infrared ray absorbing agent; and an upper layer containing (C) a water-insoluble and alkali-soluble polyurethane resin and (D) a polyorganosiloxane. COPYRIGHT: (C)2011,JPO&INPIT