Method of Developing a Lithographic Printing Plate Including Post Treatment

A method for producing a lithographic plate from a negative working, radiation imageable plate having an oleophilic resin coating that reacts to radiation by cross linking and is non-ionically adhered to a hydrophilic substrate. The steps include imagewise radiation exposing the coating to produce a...

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Hauptverfasser: RYAN WILLIAM J, KITSON ANTHONY PAUL, FROMSON HOWARD A, ANDERSON BRIAN L
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creator RYAN WILLIAM J
KITSON ANTHONY PAUL
FROMSON HOWARD A
ANDERSON BRIAN L
description A method for producing a lithographic plate from a negative working, radiation imageable plate having an oleophilic resin coating that reacts to radiation by cross linking and is non-ionically adhered to a hydrophilic substrate. The steps include imagewise radiation exposing the coating to produce an imaged plate having partially reacted image areas at an initial double bond conversion rate including unreacted coating material, and completely unreacted nonimage areas; developing the plate by removing only the unreacted, nonimage areas from the substrate while retaining unreacted material in the image areas; and subjecting the upper surface of the plate to blanket post treatment energy, which further reacts the retained unreacted material in the image areas to increase the initial double bond conversion rate, producing a lithographic printing plate with enhanced durability.
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subjects LINING MACHINES
PERFORMING OPERATIONS
PRINTING
PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTINGSURFACES
STAMPS
TRANSPORTING
TYPEWRITERS
title Method of Developing a Lithographic Printing Plate Including Post Treatment
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