WATERLESS PLANOGRAPHIC PRINTING ORIGINAL PLATE, METHOD FOR PRODUCING WATERLESS PLANOGRAPHIC PRINTING PLATE, METHOD FOR SORTING WATERLESS PLANOGRAPHIC PRINTING PLATE, AND METHOD FOR PRODUCING PRINTED MATERIAL
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United States of America Patent
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Issued Date -
Sep 19, 2024
app pub date -
Aug 1, 2022
filing date -
Aug 24, 2021
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Abstract
Disclosed is a waterless planographic printing plate precursor including at least a substrate, a heat sensitive layer and an ink repellent layer in this order, wherein the substrate has a white color layer or a white color surface, and wherein the heat sensitive layer includes at least (a) an infrared-absorbing dye having a maximum absorption wavelength of 700 to 1,000 nm, (b) a dye that changes color by proton acceptance, and (c) a proton-donating compound. The present invention provides a waterless planographic printing plate precursor capable of obtaining high contrast between the image area and the non-image area by exposure without the need for a special layer.
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