| abstract |
PURPOSE:To prevent bleeding phenomenon and to improve the stability against the lapse of time by constituting a photosensitive compsn. of a monomer having one photopolymerizable ethylenic unsatd. group and a photopolymn. initiator having a specified structure. CONSTITUTION:A photosensitive compsn. is constituted of a monomer having one ethylenic unsatd. group which is photopolymerizable by active rays and a photopolymn. initiator having a specified structural formula I. R1 and R3 in the formula I are 1-18C alkyl, substituted alkyl, aryl, or substituted aryl (wherein R1 may be H), and R2 is 1-10C alkylene or arylene; l is an integer 1-10; X is a chlorine atom or bromine atom. Further a linear org. polymer is added in order to permit development using water or weakly alkaline water. By this method, the bleeding phenomenon due to the migration of the photopolymn. initiator to the surface of the photosensitive layer or due to the coagulation and crystallization of the initiator, is prevented. |