Patent ID: 8496743

Claim:
An ink composition comprising: C.I. Acid Red 52; C.I. Acid Red 92; and a dye represented by the formula (I) below, wherein the ratio of the total content of the C.I. Acid Red 52 and the C.I. Acid Red 92 to the content of the dye represented by the formula (I) is 1:0.1 to 1:4, (wherein, R 1 to R 10 each represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a sulfo group, or a salt thereof; in the case where R 1 and R 5 each independently represent an alkyl group, the total of the number of carbon atoms constituting the alkyl group of R 1 and the number of carbon atoms constituting the alkyl group of R 5 is 3 or more, and R 1 and R 5 each may have a substituent; in the case where R 6 and R 10 each independently represent an alkyl group, the total of the number of carbon atoms constituting the alkyl group of R 6 and the number of carbon atoms constituting the alkyl group of R 10 is 3 or more, and R 6 and R 10 each may have a substituent; and M 1 represents a hydrogen atom or an alkali metal atom.