Method of on-press developing lithographic plates utilizing microencapsulated developers
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United States of America Patent
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May 14, 1996
Grant Date -
N/A
app pub date -
Nov 1, 1993
filing date -
Nov 1, 1993
priority date (Note) -
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Abstract
A lithographic printing plate for use on a printing press, with minimal or no additional processing after exposure to actinic radiation, comprises a printing plate substrate, a polymeric resist layer capable of imagewise photodegradation or photohardening, and a plurality of microencapsulated developers capable of blanket-wise promoting the washing out of either exposed or unexposed areas of the polymeric resist. The microencapsulated developers may be integrated into the polymeric resist layer, or may form a separate layer deposited atop the polymeric resist layer, or may be coated onto a separate sheet support capable of being brought into face-to-face contact with conventional printing plates.
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