Patent ID: 7279034

Claim:
An ink composition containing at least water, a phthalocyanine-based cyan dye, and a lithium salt of an aromatic compound having a sulfo group and expressed by the following General Formulas 1 and/or 2: where X is an integer of at least 1, R 1 and R 2 are each a hydrogen atom, a C 1 to C 6 alkyl group, or a C 1 to C 6 alkoxy group, and R 1 and R 2 may be the same or different where Y is an integer of at least 1, R 3 and R 4 are each a hydrogen atom, a C 1 to C 6 alkyl group, or a C 1 to C 6 alkoxy group, and R 3 and R 4 may be the same or different.