abstract |
(57) [Problem] It is useful as an ink for producing printed wiring boards such as an etching resist, a plating resist, a solder resist ink and a marking ink, and a resist for producing a nameplate, and can be made water-soluble. Provided is a photocurable printing ink in which water can be easily removed from a printing plate by washing, and the photocurable film has high water resistance. SOLUTION: (A) a water-soluble photosensitive resin obtained by introducing a styrylpyridinium group or a styrylquinolinium group into a polyvinyl alcohol-based polymer, and (B) at least one photoreactive ethylene in a molecule. A compound having an unsaturated group, (C) a photopolymerization initiator, and (D) water. |