LITHOGRAPHIC PRINTING ORIGINAL PLATE, MANUFACTURING METHOD FOR LITHOGRAPHIC PRINTING PLATE AND LITHOGRAPHIC PRINTING METHOD

摘要

PROBLEM TO BE SOLVED: To manufacture a lithographic printing plate while confirming an image using a confirmation means with successful shelf stability and high sensitivity.

SOLUTION: A dye which develops color or decolors through a chemical reaction with a chemical compound containing a primary amino group and a precursor of a chemical compound containing a primary amino group, are added to an imaging layer of the lithographic printing original plate and made to function as a printing agent.

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