For the purpose of providing an ink for inkjet recording that allows substantially
bleed-free printing to be performed on plain paper, and particularly recycled paper,
and providing an inkjet ink capable of ensuring high print quality and maintaining
high ejection stability on plain paper, recycled paper, and coated paper, the present
invention provides an inkjet ink comprising, together with a coloring material
and water, a nonionic substance that has acetylene bonds in the molecules thereof
and that also has hydroxyl groups and/or alkylene oxide repeating structures (preferably
a substance whose structure is shown by formula (IA) according to claim 2,
a substance whose structure is shown by formula (I) according to claim 20,
or the like), and a nonionic substance that has lipophilic units comprising alkyl
groups or cycloalkyl groups and that also has alkylene oxide repeating structures
(preferably a substance whose structure is shown by formula (IIA) according to
claim 2, a substance whose structure is shown by formula (II) according
to claim 20, or the like).
