IMAGEABLE COMPOSITION FOR PHOTOSENSITIVE NEGATIVE-WORKING LITHOGRAPHIC PRINTING PLATE, AND PLATEMAKING METHOD THEREFOR
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United States of America
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Issued Date -
Jan 30, 2025
app pub date -
Apr 1, 2022
filing date -
Apr 1, 2022
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Abstract
Provided is an imageable composition for a photosensitive negative-working lithographic printing plate, and a platemaking method therefor. The imageable composition includes the following components in parts by mass: 25-65 parts of a free radical polymerizable compound, 0.5-25 parts of a photoinitiator, 10-60 parts of a binder, and 1-20 parts of a development accelerator. The platemaking method may comprise coating a substrate, which may have a hydrophilic surface or a hydrophilic layer, with an imageable composition to obtain a photosensitive negative-working lithographic printing plate precursor. The method may additionally include exposing the lithographic printing plate precursor by using laser light and according to a required image, so as to form an exposed region and an unexposed region. Further the method may include removing the unexposed region from the exposed printing plate precursor by means of a development process, so as to obtain a required lithographic printing plate.
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