| abstract |
PROBLEM TO BE SOLVED: To provide a photosensitive composition useful as a recording layer of a lithographic printing plate precursor capable of direct plate making by scanning exposure based on a digital signal from a computer or the like, having a wide development latitude, and having excellent ink deposition of an image area. Offer things. An intermediate layer containing a polymer compound containing an acid group-containing component and an onium group-containing component on a support, a dye that absorbs infrared light or near-infrared light, and polyvinyl acetal. And a photosensitive layer. The polyvinyl acetal preferably has a structure represented by the following general formula (I). In general formula (I), R 01 represents a hydrocarbon group, and R 02 represents an aromatic group having a hydroxyl group as a substituent. m = 5-40 mol%, n = 10-60 mol%, o = 1-10 mol%, and p = 5-50 mol%. [Chemical 1] [Selection figure] None |