| abstract |
Disclosed is a magenta ink composition having excellent printing quality and good fixability of a coloring agent to a printed matter, which enables to obtain a printed matter excellent in moisture resistance, ozone resistance and light resistance. The magenta ink composition also has stable ejection reliability since it is suppressed in foaming properties. Specifically disclosed is a magenta ink composition characterized by containing at least one compound represented by the formula (I) below and at least one compound represented by the formula (II) below as coloring agents. (I) (In the formula (I), R1-R5 independently represent a hydrogen atom, an alkyl group, a sulfo group or a salt thereof; and X, Y and Z independently represent an aromatic group or a heterocyclic group.) (II) (In the formula (II), M represents a hydrogen atom, an ammonium group or an alkali metal atom; X represents a diaminoalkylene group; and n represents 1 or 2.) |