Photosensitive composition, image-forming material and image-forming method employing it

An image-forming material comprising a substrate and a photosensitive layer made of the photosensitive composition comprising (a) an ethylenically unsaturated double bond-containing compound, (b) a sensitizing dye and (c) a photopolymerization initiator, wherein the sensitizing dye is a phthalocyanine compound showing the maximum absorption within a range of from 750 to 1,200 nm, formed on the substrate, wherein more than one aromatic ring of said phthalocyanine compound has a substituent, and the substituents are bonded together to form a condensed ring, which condensed ring is optionally substituted.

A photosensitive lithographic printing plate comprising an aluminum support treated by surface roughening and anodic oxidation, and a layer made of the photosensitive composition comprising (a) an ethylenically unsaturated double bond-containing compound, (b) a sensitizing dye and (c) a photopolymerization initiator, wherein the sensitizing dye is a phthalocyanine compound showing the maximum absorption within a range of from 750 to 1,200 nm, formed on the support, wherein more than one aromatic ring of said phthalocyanine compound has a substituent, and the substituents are bonded together to form a condensed ring, which condensed ring is optionally substituted.