Patent ID: 6187929
Filing Date: 2001-02-13
Classification: C09B,G03C

Abstract:
A dye represented by the following formula (1);Formula (1) ##STR78##wherein A represents an acidic nucleus, L.sub.1, L.sub.2 and L.sub.3 represent a methine group, n represents 0, 1 or 2, Z represents a nonmetalic atom group necessary to form a heterocyclic group by bonding with a nitrogen atom included in the formula (1), Y represents a substituent represented by the following formula (2) or a heterocyclic group;Formula (2) ##STR79##wherein R.sub.1 and R.sub.2 represent an alkyl group, and R.sub.1 and R.sub.2 may form a ring by bonding with each other, R.sub.3 represents a hydrogen atom or an electron withdrawing group:said dye represented by the formula (1) has at least one carboxy group or one alkylsulfonamide group in an aromatic ring portion of its molecular structure.