Patent ID: 7029523
Filing Date: 2006-04-18
Classification: C09D

Abstract:
1. A black ink for ink-jet recording, comprising a dye dissolved and/or dispersed in an aqueous medium, wherein the dye has a λmax of 500 to 700 nm and a half value width of 100 nm or more in an absorption spectrum of a dilute solution normalized to an absorbance of 1.0 and is a dye represented by the following general formula (1): wherein A, B and C each independently represent an aromatic or heterocyclic group, which are substituted or unsubstituted provided that two or more of A, B and C is a substituted or unsubstituted, unsaturated heterocyclic group; m is 1 or 2; n is 1 or 2, wherein the black ink has: a transition metal ion content of 0.1 mmol/l or less; and a forced fading rate constant k