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

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 following formula (I), 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:
• wherein R1, R2 and R3 each independently represents a halogen atom, an alkyl group which may have a substituent, an aryl group which may have a substituent, an aralkyl group which may have a substituent, an —NR4R5 group or an —OR6 group in which R4, R5 and R6 each independently represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group which may have a substituent or an aralkyl group which may have a substituent;
• and k, m and n each independently represents an integer of from 0 to 5.