Patent ID: 6908719

Claim:
A water-soluble photosensitive compound represented by the following general formula (1): in the formula, X represents an alkylene group containing 1 to 5 carbon atoms, —CH 2 O—, —OCH 2 —, —CH 2 OCH 2 —, —O—, —S— or —SO 2 —, Z represents —SO 3 − .Q + , —COO − .Q + or —SO 2 NR 2 , in which Q + represents Li + , Na + , K + or N + R 4 , and R represents a hydrogen atom and/or an alkyl group containing 1 to 5 carbon atoms, and said alkyl group optionally having one hydroxy, ether, carbonyl, carbonyloxy or oxycarbonyl group, and the two Z groups may be the same or different or by the following general formula (2): in the formula, X represents a direct bond, an alkylene group containing 1 to 5 carbon atoms, —CH 2 O—, —OCH 2 —, —CH 2 OCH 2 —, —O—, or —SO 2 — and Z represents —SO 3 − .Q + , —COO − .Q + or —SO 2 NR 2 , in which Q + represents Li + , Na + , K + or N + R 4 and R represents a hydrogen atom and/or an alkyl group containing 1 to 5 carbon atoms, said alkyl group optionally having one hydroxy, ether, carbonyl carbonyloxy or oxycarbonyl group, wherein a photosensitive group has an absorption maximum wavelength of not longer than 305 nm the ultraviolet absorption spectrum thereof.