Ink comprising: at least one of a compound represented by chemical formula 1, a compound represented by chemical formula 2, a compound represented by chemical formula 3, or a compound represented by chemical formula 4, where R 1 represents a hydrocarbon group having 1 to 10 carbon atoms and R 2 represents a monovalent group comprising a group represented by -OX 1, where X 1 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by -COOX 2, where X 2 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by - NX 4 X 5, where X 4 and X 5 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, a monovalent group comprising a group represented by - CONX 6 X 7, where X 6 and X 7 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, or a monovalent group comprising a hydroxyl group, where, R 3 and R 4 each, independently represent monovalent groups comprising groups represented by -OX 1, where X 1 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by -COOX 2, where X 2 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by -NX 4 X 5, where X 4 and X 5 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, a monovalent group comprising a group represented by -CONX 6 X 7, where X 6 and X 7 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, or a monovalent group comprising a hydroxyl group, where a ring A represents a saturated five-membered ring or a saturated six-membered ring, both comprising a nitrogen atom, R 5 represents a monovalent group comprising a group represented by -OX 1, where X 1 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by - COOX 2, where X 2 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by -NX 4 X 5, where X 4 and X 5 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, a monovalent group comprising a group represented by -CONX 6 X 7, where X 6 and X 7 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, or a monovalent group comprising a hydroxyl group, and a is 1, 2, or 3, and where a ring B represents a saturated five-membered ring or a saturated six-membered ring, both comprising two nitrogen atoms, R 6 represents a monovalent group comprising a group represented by -OX 1, where X 1 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by - COOX 2, where X 2 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms, a monovalent group comprising a group represented by -NX 4 X 5, where X 4 and X 5 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, a monovalent group comprising a group represented by -CONX 6 X 7, where X 6 and X 7 each, independently represent monovalent hydrocarbon groups having 1 to 10 carbon atoms, a monovalent group comprising a hydroxyl group, or an alkyl group having 1 to 10 carbon atoms.