An ink composition contains (component A) a high-molecular-weight polymerization initiator having a weight-average molecular weight of equal to or greater than 1,000, (component B) a polymerizable compound, and (component C) a colorant, in which the component A has an acylphosphine oxide structure, and the acylphosphine oxide structure is linked to a main chain or a core of the component A on the side of an acyl group thereof.
一种油墨组合物含有(成分 A)重量平均分子量等于或大于 1 000 的高分子量聚合
引发剂、(成分 B)可聚合化合物和(成分 C)
着色剂,其中成分 A 具有酰基氧化膦结构,酰基氧化膦结构在其酰基一侧与成分 A 的主链或核心相连。