Process of preparing planographic printing plate

Details Process of preparing planographic printing plate Process of preparing planographic printing plate

2008-01-08

2008-01-08

Chu, John S. (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

C430S175000, C430S176000, C430S281100, C430S287100

Reexamination Certificate

active

07316892

ABSTRACT:
Disclosed is a process of preparing a planographic printing plate from a light sensitive planographic printing plate material comprising a hydrophilic support and provided thereon, an image formation layer containing (A) a polymerization initiator selected from a hexaarylbisimidazole compound and a diazo resin, and (B) an alkali soluble resin with an acid value of 5 to 200 having an acryloyl group or a methacryloyl group, the alkali soluble resin being obtained by reacting a vinyl copolymer having a monomer unit derived from acrylic acid or methacrylic acid with an epoxy compound having an acryloyl group or a methacryloyl group in the molecule, and, the process comprising the steps of imagewise exposing the light sensitive planographic printing plate material to ultraviolet laser, and removing an image formation layer at non-exposed portions with an aqueous alkali solution to form an image.

REFERENCES:
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patent: 6890701 (2005-05-01), Yanaka
patent: 7147991 (2006-12-01), Matsumura
patent: 2002/0048721 (2002-04-01), Kamiya et al.
patent: 10-282658 (1998-10-01), None

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