Lithographic printing plate and method for manufacturing the same
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United States of America Patent
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Aug 10, 1999
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app pub date -
Jun 3, 1997
filing date -
Jun 3, 1997
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Abstract
A printing plate for use in lithographic printing has a thermally responsive recording material. A plate is fabricated with a photosensitive emulsion affixed to an upper surface of an aluminum substrate. The plate is first chemically processed so that it is capable of accepting ink (i.e., oleophilic). Thereafter, selected areas of the emulsion are thermally removed, preferably by exposure to a high power laser beam. The plate is ready for immersion into an aqueous ink solution.
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