ON-MACHINE DEVELOPMENT TYPE PLANOGRAPHIC PRINTING PLATE PRECURSOR, METHOD FOR PREPARING PLANOGRAPHIC PRINTING PLATE, AND PLANOGRAPHIC PRINTING METHOD
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United States of America
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Issued Date -
Mar 20, 2025
app pub date -
Nov 21, 2024
filing date -
Nov 21, 2024
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Abstract
An on-machine development type planographic printing plate precursor has a support and an image-recording layer on the support. The image-recording layer contains an initiator, an infrared absorber capable of donating electrons to the initiator, and a color-developing substance precursor. The image-recording layer can form an image by exposure to infrared laser, and in a case where the image-recording layer is exposed to an infrared laser with a wavelength of 830 nm at an energy density of 110 mJ/cm2, a brightness change ΔL of the image-recording layer before and after the exposure is 3.0 or more. A method for preparing a planographic printing plate and a planographic printing method employ the on-machine development type planographic printing plate precursor.
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