ON-PRESS DEVELOPMENT TYPE LITHOGRAPHIC PRINTING PLATE PRECURSOR AND METHOD FOR PRODUCING LITHOGRAPHIC PRINTING PLATE

摘要

An on-press development type lithographic printing plate precursor including an aluminum support having an anodized film and an image-recording layer provided on the support, a shear droop shape in which an amount X of shear droop is from 25 to 150 μm and a width Y of shear droop is from 70 to 300 μm is provided on an edge portion of the lithographic printing plate precursor, and an area ratio of cracks present on a surface of the anodized film in a region corresponding to the width of shear droop Y of the lithographic printing plate precursor is 30% or less, and a method for producing a lithographic printing plate using the on-press development type lithographic printing plate precursor are provided.