Method and a plate for digitally-imaged offset printing
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United States of America Patent
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May 31, 2005
Grant Date -
Jul 17, 2003
app pub date -
Dec 5, 2000
filing date -
Dec 7, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
An offset plate sensitive to UV or visible light, prepared simply and imaged digitally therewith in a CTP method, and also processed in a simple manner. The plate is provided as a photopolymer plate with increased sensitivity, and is used in a simple imaging-on-press system, using the surface of a lithographic printing cylinder itself as a plate substrate. The method of preparing the printing plate begins by applying a photosensitive liquid coating to the substrate, digitally imaging the coated substrate, using an actinic light source to polymerize portions of the liquid coating in accordance with the imaging, and washing the liquid.
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