Lithographic printing plates for use with laser-discharge imaging apparatus
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United States of America Patent
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Aug 23, 1994
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app pub date -
May 13, 1993
filing date -
Jul 20, 1992
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Abstract
Lithographic printing plates suitable for imaging by means of laser devices that emit in the near-infrared region. Laser output either ablates one or more plate layers or physically transforms a surface layer, in either case resulting in an imagewise pattern of features on the plate. The image features exhibit an affinity for ink or an ink-abhesive fluid that differs from that of unexposed areas.
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