| 摘要 |
PROBLEM TO BE SOLVED: To provide an active ray-curable inkjet ink that hardly causes discharge failure such as irregular landing of a liquid droplet or mis-ejection in a nozzle when an active ray-curable inkjet ink containing a gelling agent is ejected at a high temperature.SOLUTION: The active ray-curable inkjet ink comprises a photopolymerizable compound, a pigment, a pigment dispersant, a gelling agent, a photopolymerization initiator and a compound having a polar group, and has a viscosity of 1000 mPa s at 25. The compound having a polar group is a compound (A) having such properties that: a dissolving amount of the compound in 100 g or water at 25°C is 1.0 g or more; a dissolving amount of the compound in 100 g of tripropylene glycol diacrylate at 25°C is 0.1 g or less; and an aqueous solution of the compound shows a maximum λMAX of an absorption spectrum peak within the range from 250 nm to 550 nm. The compound (A) is included by 0.01 or more and less than 2.4 mass% with respect to the whole ink amount. |
