Patent ID: 7960521

Claim:
A trisazo dye, of which the free acid form is represented by the following formula (1), wherein at least one of the groups represented by B 1 and D 1 has at least one substituent as defined by Q1, which is an alkyl group or alkoxy group substituted by a hydrogen bond-forming group: wherein A 1 is a phenyl group or naphthyl group which may be substituted, each of B 1 and D 1 which are independent of each other, is a phenylene group or naphthylene group which may be substituted, and may have a substituent other than Q1, X 1 is an amino group which may be substituted or a hydroxyl group, and is located at the 6- or 7-position on the terminal naphthyl group, and m is 0 or 1, and wherein at least one of the following (1), (2) and (3) applies: (1) in the formula (1), each of B 1 and D 1 which are independent of each other, is a group represented by the following formula (a) or (b): wherein each of Q3 and Q4 which are independent of each other, is a substituent as defined by the above Q1, p is 1 or 2, and n is 0 or 1, (2) in the above formula (1), A 1 is a group represented by the following formula (c): wherein Y 1 is a sulfo group, a carboxy group or a phosphoric acid group, Z 1 is a halogen atom, a hydroxyl group, a nitro group, a cyano group, an amino group which may be substituted, a C 1-4 alkyl group which may be substituted, a C 1-4 alkoxy group which may be substituted, a sulfo group or a carboxy group, and q is 0 or 1, and (3) X 1 is a hydroxyl group.