Method for preparation of lithographic printing plate and lithographic printing plate precursor

摘要

A method for preparing a lithographic printing plate comprising: exposing a lithographic printing plate precursor comprising: a support having a hydrophilic surface; a photosensitive layer containing a phthalocyanine pigment covered with a polymer having a group represented by the formula (I) or (II) as defined herein in its side chain and a hydrophobic binder polymer having an acid value of 0.3 meq/g or less; and a protective layer provided in this order; and removing the protective layer and an unexposed area of the photosensitive layer in a presence of a developer having pH of from 2 to 10 in an automatic processor equipped with a rubbing member.