Patent ID: 8070868

Claim:
An ink comprising at least one coloring matter represented by formula (5): wherein R 1 represents an aryl group having an ionic hydrophilic group; R 3 represents an electron-withdrawing group having a Ïƒp value of 0.20 or more; and A represents one group selected from the group consisting of the monovalent substituent groups in a formula (2), which may have a substituent: wherein in the monovalent substituent groups (A-1) to (A-42) represented by the formula (2), R 11 to R 115 each independently represents one of a hydrogen atom and a substituent; Q 1 in (A-12), Q 2 in (A-41) and Q 3 in (A-42) each represents a nonmetallic atom group necessary for forming one of a 5- to 7-membered hydrocarbon ring together with the nitrogen atom and a 5- to 7-membered heterocyclic ring together with the nitrogen atom; R represents a substituent; r represents an integer of 0 to 4; and when a plurality of substituent R are present, each R's may be independently the same or different.