RADIATION CURABLE INK JET COMPOSITION, RECORDED MATTER, AND INK JET RECORDING METHOD

摘要

The invention provides a radiation curable ink jet ink composition including: a monomer equal to or more than 20% by mass and equal to or less than 50% by mass with respect to the total mass of the ink composition, which is represented by the following formula (I); and N-vinylcaprolactam equal to or more than 5% by mass and equal to or less than 15% by mass with respect to the total mass of the ink composition: CH2═CR1—COOR2—O—CH═CH—R3  (I) wherein, R1 is a hydrogen atom or a methyl group, R2 is a divalent organic residue having 2 to 20 carbon atoms, and R3 is a hydrogen atom or monovalent organic residue having 1 to 11 carbon atoms.