| abstract |
A method for producing a planographic printing plate is provided, which includes: subjecting a planographic printing plate precursor to image-wise exposure, wherein the precursor includes plural recording layers at least one of which contains (A) an infrared absorbing agent on a support, the upper recording layer contains (B) a water-insoluble and alkali-soluble polymer compound having a repeating unit containing a fluoroalkyl group or a siloxane structure; and developing the precursor using an alkali developer containing (C) an ammonium salt compound represented by Formulae (C-1) to (C-3), wherein R 1 represents a methyl group or the like, R 2 and R 3 represent a hydrocarbon group having 3 to 20 carbon atoms, R 4 represents a hydrocarbon group, A represents an atomic group which forms a nitrogen-containing aliphatic ring with N + , B represents an atomic group which forms a nitrogen-containing aromatic ring with N + , and X - represents a counter anion. |