Method for preparing photographic elements having single photosensitive layer containing photopolymerizable compound, photoinitiator, diazonium compound and barrier material encapsulated pigment particles; and negative image formation process
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United States of America Patent
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Aug 23, 1994
Issued Date -
N/A
app pub date -
Nov 5, 1993
filing date -
Jan 29, 1988
priority date (Note) -
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Abstract
Photopolymeric printing plates are presented wherein and electrochemically etched and anodized, silicated aluminum substrate has a single photosensitive coating thereon composed of a photopolymerizable combination which includes a photopolymerizable pigment dispersion, a photosensitive lithographic diazonium resin, multifunctional acrylate oligomer, multifunctional acrylate monomer, photopolymerizable binder and photoinitiator to yield a non-tacky, mar resistant, easily developed durable plate. In a preferred embodiment, an additional aqueous, non-photosensitive overcoat is applied over the initial coating to retard oxygen inhibition.
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