| abstract |
An aqueous ink composition comprising at least: a surface-modified pigment capable of at least one of dispersing and dissolving in an aqueous solvent without use of a dispersant; an organic amine compound represented by formula (A) or (B) shown below; and water,wherein R1 to R6 each independently represents a hydrogen atom or an alkyl or hydroxyalkyl chain having from 1 to 8 carbon atoms, which may have a branch, provided that at least one of R1 to R3 is an alkyl or hydroxyalkyl chain having from 3 to 8 carbon atoms, which may have a branch. Also disclose is an aqueous ink composition comprising at least a pigment, a dispersant, an organic amine compound represented by formula (A) or (B) shown below, a penetration accelerator and water. |