| 摘要 |
<p>The present invention relates to a platemaking method of a lithographic printing plate, comprising developing with friction an exposed lithographic printing plate precursor with a developer, wherein the exposed lithographic printing plate precursor is obtained by an image recording method comprising imagewise exposing a lithographic printing plate precursor with an imaging time per pixel of 1 millisecond or less using a laser light with an emission wavelength of from 250 nm to 420 nm. The lithographic printing plate precursor comprises a support and an image recording layer. The image recording layer contains (A) a polymerization initiator and (B) a polymeric compound and is photosensitive in a wavelength of from 250 nm to 420 nm, and the support has an undercoat layer containing a compound that contains a polymerizable group and a support adherent group on the support. The developer used in the platemaking method of the invention is a non-alkaline developer having a pH value of from 2 to 10. After the development with friction, the lithographic printing plate is optionally subjected to washing, drying and desensitizing treatment.</p> |
