| 摘要 |
The present invention relates to a positive planographic printing plate precursor, comprising a support having disposed thereon a positive recording layer containing (A) a water-insoluble and alkali-soluble resin, (B) an infrared absorbent and (C) an organic quaternary ammonium salt, wherein solubility of the recording layer in an aqueous alkali solution is increased by exposure to an infrared laser, wherein the organic quaternary ammonium salt (C) has in a molecule thereof at least one of an aryl group and a carbonyl group. |
