A photopolymerization method in which an ink composition including (A) a polymerizing compound having an ethylenic unsaturated group, (B) a photopolymerization initiator represented by Formula (1) described below, and (C) a hydrogen donor having a structure in which a nitrogen atom is directly bonded to an aromatic ring, in which the aromatic ring has an electron-withdrawing group or the nitrogen atom constitutes a hetero ring, is photopolymerized under acidic conditions,
in Formula (1), each of R1 to R30 represents a hydrogen atom, a halogen atom, an alkyl group, or an alkoxy group.
一种在酸性条件下进行光聚合的油墨组合物的光聚合方法,其中包括:(A) 具有
乙烯不饱和基团的聚合化合物;(B) 由下述式(1)表示的光聚合
引发剂;(C) 具有氮原子直接键合到芳香环上的结构的氢供体,其中芳香环上有一个抽电子基团或氮原子构成一个杂环、
式(1)中,R1 至 R30 各代表氢原子、卤素原子、烷基或烷氧基。