PURPOSE: To obtain the titled plate having an improved solvent resistance by incorporating an uncured synthetic gum, an acylate monomer or a methacrylate monomer and a photopolymerization initiator to the photosensitive gum.

CONSTITUTION: The compd. having isocyanate groups at both end thereof is prepared by reacting a diisocyanate compd. with a liquid gum composed of 1,4-polybutadiene having hydroxy groups at the both ends thereof respectively. The titled composition comprises 100pts.wt. the photosensitive gum which has 6,000W10,000 the mol.wt. and is obtd. by reacting it with the acrylate or the methacrylate having an alcoholic hydroxy group, 50W100pts.wt. the uncured synthetic gum, 5W150pts.wt. the acrylate monomer contg. ≥1 the acryl group or the methacrylate monomer contg. ≥1 the methacryl group, and 0.5W30pts.wt. the photopolymerization initiator. Thus, the titled composition having the improved solvent resistance property is obtd.