Patent ID: 7597437

Claim:
An ink jet ink composition comprising at least water, a colorant and a water-soluble organic solvent, wherein the ink jet ink composition comprises at least one amine compound represented by the following formula (1) in a range of more than 10% to 30% by mass: wherein the amine compound represented by the formula (1) is any one of primary to tertiary amine compounds; at least two of the three substituents represented by R 1 , R 2 and R 3 in the formula (1) comprise a hydrocarbon group having a hydroxyl group; none of the three substituents contain an alkyl group having at its terminal either one of —CO 2 M and —SO 3 M in which M represents an atom or an atomic group selected from hydrogen, an alkali metal, an alkaline earth metal, an ammonium group and an organic amine group; and none of the three substituents represented by R 1 , R 2 and R 3 is linked to the nitrogen atom N of formula (1) through a carbon atom which is linked to fewer than three other atoms in addition to the nitrogen atom N, wherein a melting point or decomposition point of the amine compound is 50° C. or more, and a surface tension of the ink composition is 40 mN/m or less.