| abstract |
[PROBLEMS] To provide a photosensitive composition using a novel photoinitiating system having high sensitivity to a wavelength of 350 to 450 nm and excellent storage stability, and workability provided with such a photosensitive composition on a support. The present invention provides a lithographic printing plate precursor for a CTP system excellent in economic efficiency and storage stability. (A) a sensitizing dye having a specific structure, (B) an initiator compound capable of generating a radical, an acid or a base, and (C) a polymerizable compound which reacts with at least one of a radical, an acid or a base, Containing the photosensitive composition. A negative lithographic printing plate precursor comprising the photosensitive composition provided on a support. [Selection figure] None |