| abstract |
An ink, which contains at least one dye of formula (1): n A-N═N—BX 1 n1 B′—N═N-A′ Formula (1) n wherein A and A′ each independently represent an aryl group or a monovalent heterocyclic group; B and B′ each independently represent an arylene group or a divalent heterocyclic group; X 1 represents a divalent linking group; n1 is 0 or 1; and at least one of A, B, A′, and B′ is a heterocyclic group. |