| abstract |
To provide an ink having good storage stability and excellent ejection stability. An ink comprising a pigment, a compound represented by the general formula (1), a monomer-containing copolymer having a naphthalene structure or a biphenyl structural unit at a terminal, and water. (X is H or a monovalent cation; n is an integer of 0 to 5 and the number of substituted sulfonic acid groups) [Selection figure] None |