Laser-driven method and apparatus for lithographic imaging
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United States of America Patent
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Jan 31, 1995
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Nov 29, 1993
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Jul 20, 1992
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Abstract
Apparatus and methods for imaging lithographic plates using laser devices that emit in the near-infrared region, and plates suitable for imaging with the apparatus and methods. 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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