On-press development type lithographic printing plate precursor, method of preparing lithographic printing plate, and lithographic printing method

Abstract

Provided are an on-press development type lithographic printing plate precursor comprising: a support; and an image recording layer on the support, wherein the image recording layer contains a polymerizable compound and polymer particles, a median diameter of the polymer particles is in a range of 50 nm to 120 nm, a content of the polymer particles is 42% by mass or more and 90% by mass or less with respect to a total mass of the image recording layer, and a standard deviation of an area ratio of a non-stained portion in a cross-sectional image is less than 6, the cross-sectional image being obtained by performing an osmium staining treatment on a cross section of the lithographic printing plate precursor in a thickness direction, performing observation the cross section with a scanning electron microscope, and binarizing the cross-sectional image into a stained portion and the non-stained portion.

Dependencies are inferred from the claim text.