Image formation method of planographic printing plate material

Details Image formation method of planographic printing plate material Image formation method of planographic printing plate material

2006-03-14

2006-03-14

Schilling, Richard L. (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

C430S271100, C430S273100, C430S494000, C430S926000

Reexamination Certificate

active

07011928

ABSTRACT:
Disclosed is a method of forming an image on a light sensitive planographic printing plate material comprising a hydrophilic support and provided thereon, a light sensitive layer containing an addition polymerizable ethylenically unsaturated monomer, a photopolymerization initiator, a polymer binder, and a sensitizing dye having an absorption maximum in the wavelength regions of from 390 to 430 nm, the minimum laser exposure amount necessary to form an image on the material being from 1.0 to 100 μJ/cm2, the method comprising the step of imagewise exposing the light sensitive planographic printing plate material to laser under a non-yellow safelight to form an image, the non-yellow safelight having an optical filter cutting out light with a wavelength of less than 440 nm, and satisfying the following expression:in-line-formulae description="In-line Formulae" end="lead"?0.800<I/I700<1.00.in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 2003/0198893 (2003-10-01), Oshima
patent: 0 985 683 (2000-03-01), None
patent: 1 148 387 (2001-10-01), None
patent: 2004295024 (2004-10-01), None

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