| abstract |
(57) [Problem] To provide an original plate for producing a mask having a photopolymerization layer having high sensitivity to visible light, high resolution and excellent film physical properties. SOLUTION: A photopolymer layer containing a metal thin film provided on a transparent support, and a thermoplastic polymer binder, a compound having a structure represented by the following general formula (I) and a photopolymerization initiator is provided thereon. An original plate for making a mask, characterized by the provision of |