An ink composition is provided that includes (A) an N-vinyllactam, (B) a (meth)acrylic acid ester and/or amide having at least 3 alkylene oxide groups per molecule, and (C) a polymerization initiator, the content of the N-vinyllactam (A) being at least 10 wt % of the ink total weight. There is also provided an inkjet recording method that includes (a
1
) a step of discharging the ink composition onto a recording medium and (b
1
) a step of curing the ink composition by irradiating the discharged ink composition with actinic radiation. A printed material recorded by the inkjet recording method is also provided. Furthermore, a process for producing a lithographic printing plate is provided that includes (a
2
) a step of discharging the ink composition onto a hydrophilic support and (b
2
) a step of curing the ink composition by irradiating the discharged ink composition with actinic radiation so as to form a hydrophobic image on the hydrophilic support by curing the ink composition.
                            提供了一种油墨组合物,其中包括(A)N-
乙烯内酰胺,(B)至少每个分子具有3个烷氧基团的(甲基)
丙烯酸酯和/或酰胺,以及(C)聚合
引发剂,其中N-
乙烯内酰胺(A)的含量至少占油墨总重量的10重量%。还提供了一种喷墨记录方法,其中包括(a1)将油墨组合物排放到记录介质上的步骤和(b1)通过照射排放的油墨组合物以致固化油墨组合物的步骤。还提供了一种通过喷墨记录方法记录的印刷材料。此外,提供了一种生产平版印刷版的过程,其中包括(a2)将油墨组合物排放到亲
水性支撑体上的步骤和(b2)通过照射排放的油墨组合物以致固化油墨组合物的步骤,从而在亲
水性支撑体上形成一个疏
水图像。