Patent ID: 8372897

Claim:
An ink composition, comprising: an organic solvent, a metal pigment, and a resin, the organic solvent containing, based on the total amount of the ink composition, 60% by mass or more of diethylene glycol diethylether, 24 to 37% by mass of a combination of γ-butyrolactone and tetraethylene glycol dimethyl ether with a ratio of γ-butyrolactone to tetraethylene glycol dimethyl ether in a range of 2:3 to 1:1, and more than 1% by mass and lower than 5% by mass of tetraethylene glycol monobutyl ether, and the 50% average particle diameter in terms of sphere determined by a light scattering method of the metal pigment being 0.8 to 1.2 μm.