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Title:
PHOTOSENSITIVE LITHOGRAPHIC PRINTING PLATE MATERIAL AND METHOD FOR MAKING LITHOGRAPHIC PRINTING PLATE USING THE SAME
Document Type and Number:
Japanese Patent JP2007078952
Kind Code:
A
Abstract:

To provide a photosensitive lithographic printing plate material having very high sensitivity, high printing durability and good suitability to processing (under-developability), and and also to provide a method for making a lithographic printing plate using the same.

The photosensitive lithographic printing plate material has a photosensitive layer containing at least (A) an alkali-soluble resin, (B) a compound having an ethylenically unsaturated bond, and (C) a radical initiator and an overcoat layer in this order on a hydrophilic support, and the photosensitive lithographic printing plate material is sequentially passed through at least (1) an image exposure step, (2) a heat treating step (preheating) and (3) a developing step, thereby obtaining a lithographic printing plate. The ratio [B/A] between the component B and the component A is in a range of 1.5-3.0, the alkali-soluble resin has a glass transition temperature (Tg) which is higher than the preheating temperature by ≥10°C, and the alkali-soluble resin has a radically reactive group.


Inventors:
KUROKI TAKAAKI
Application Number:
JP2005265014A
Publication Date:
March 29, 2007
Filing Date:
September 13, 2005
Export Citation:
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Assignee:
KONICA MINOLTA MED & GRAPHIC
International Classes:
G03F7/038; G03F7/00; G03F7/027; G03F7/029; G03F7/11; G03F7/38