| abstract |
In development processing with an aqueous solution having a pH of 2 to 10, it exhibits excellent developability, prevents adsorption of an image recording component (especially a binder) removed by development to the substrate, and causes printing stains. Provides a method for processing lithographic printing plate precursors. A lithographic printing plate precursor having an image recording layer on a support having a surface subjected to a hydrophilic treatment and / or having an undercoat layer, the image recording layer in an exposed portion is cured by imagewise exposure. Then, in the processing method of a lithographic printing plate precursor for performing development processing with an aqueous solution having a pH of 2 to 10, the aqueous solution used for the development processing has an amphoteric surfactant and a fatty chain, and the total carbon number of the fatty chain is 6 or more. An anionic surfactant having an aromatic ring and an anionic surfactant selected from an anionic surfactant having a total carbon number of 12 or more, and the content of the anionic surfactant Is a processing method of a lithographic printing plate precursor characterized by being 0.1 to 3.3% by mass with respect to the entire aqueous solution. [Selection figure] None |