| 摘要 |
A UV-curable ink jet ink composition contains a polymerizable compound, a photopolymerization initiator containing an acylphosphine-based photopolymerization initiator having a phenyl group in the molecule thereof, and a fluorescent brightening agent. The fluorescent brightening agent in a predetermined concentration has a higher maximum absorbance than the photopolymerization initiator in the same concentration, in a wavelength region of 360 to 420 nm. |
