Patent ID: 8877827

Claim:
An active ray-curable inkjet ink comprising: gelling agent, photopolymerizable compounds, and a photoinitiator, the inkjet ink undergoing reversible sol-gel phase transition depending on temperature, wherein: (1) a first photopolymerizable compound of the photopolymerizable compounds is a (meth)acrylate compound having a molecular weight in the range of 300 to 1500 and having 3 to 14 unit structures represented by formula: (—CH 2 —CH 2 —O—) in the molecule, in an amount in the range of 30% to 70% by mass relative to the total mass of the ink; (2) a second photopolymerizable compound of the photopolymerizable compounds is a (meth)acrylate compound having a molecular weight in the range of 300 to 1500 and having a ClogP value in the range of 4.0 to 7.0, in an amount in the range of 10% to 40% by mass relative to the total mass of the ink; (3) the gelling agent has a total carbon number of 12 or greater and contains a linear or branched alkyl chain having 3 or more carbon atoms, and a content of the gelling agent is not more than 10% bar mass relative to the total mass of the ink.