abstract |
[PROBLEMS] To provide a lithographic printing plate material for scanning exposure that is excellent in workability and economy, is compatible with a CTP system, and is highly sensitive to the oscillation wavelength of an inexpensive short-wave semiconductor laser, and has a wide wavelength range from 350 nm to 450 nm. In contrast, a photosensitive composition using a novel photopolymerization initiating system with high sensitivity is provided. A photosensitive composition comprising (i) a sensitizing dye having a structure represented by general formula (1), (ii) an activator compound, and (iii) an addition polymerizable compound that reacts with a radical or an acid. The component (iii) is preferably an addition polymerizable compound having an ethylenically unsaturated double bond. [Selection figure] None |