LITHOGRAPHIC PRINTING PLATE PRECURSOR, METHOD OF PRODUCING LITHOGRAPHIC PRINTING PLATE, PRINTING METHOD, AND METHOD OF PRODUCING ALUMINUM SUPPORT
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United States of America Patent
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Issued Date -
Oct 19, 2023
app pub date -
Jun 21, 2023
filing date -
Dec 25, 2020
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Abstract
An object of the present invention is to provide a lithographic printing plate precursor from which a lithographic printing plate with excellent oil-based cleaner printing durability is obtained, a method of producing a lithographic printing plate, a printing method, and a method of producing an aluminum support. The lithographic printing plate precursor of the present invention is a lithographic printing plate precursor including an aluminum support, and an image recording layer disposed on the aluminum support, in which the aluminum support includes an aluminum plate and an anodized aluminum film disposed on the aluminum plate, the image recording layer is disposed on the aluminum support on a side of the anodized film, and an area ratio of projections with a height of 0.80 μm or greater from an average level, which is obtained by measuring a surface of the aluminum support on a side of the image recording layer in an area of 400 μm×400 μm using a non-contact three-dimensional roughness meter, is 20% or less.
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