| 摘要 |
A method for preparing a lithographic printing plate comprising: exposing a lithographic printing plate precursor comprising a hydrophilic support, a photosensitive layer containing a sensitizing dye having an absorption maximum in a wavelength range of from 350 to 450 nm represented by the formula (I) as defined herein, a polymerization initiator, a polymerizable compound and a hydrophobic binder polymer having an acid value of 0.3 meq/g or less and a protective layer provided in this order with a laser beam of from 350 to 450 nm; and rubbing a surface of the exposed lithographic printing plate precursor with a rubbing member in the presence of a developer having pH of from 2 to 10 in an automatic processor equipped with the rubbing member to remove the protective layer and an unexposed area of the photosensitive layer.
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