Aqueous Ink and Aqueous Dye Dispersion for Aqueous Ink

Abstract

An aqueous dye dispersion for an aqueous ink including a dye derivative as indicated at Formula (1) below; a water-insoluble dye; a dispersant; and water, makes it possible to provide an aqueous dye dispersion for aqueous ink, which reduces flocculation of particles within aqueous ink even when the aqueous ink is prepared, and has satisfactory dispersion stability during storage, thereby providing an aqueous ink having satisfactory dispersion stability during storage. (At Formula (1), R1 is a group as indicated at Formula (2), below, and R2 is a group as indicated at Formula (3), below. m and n are each 0 or 1 but m+n=1. R3 is at least one species selected from among a hydroxyl group and an amino group. l is 0 to 2; when l=2, R3 may respectively be the same or different.) (At Formula (3), R4 is a phenylene group or an alkylene group having 1 to 4 carbons; R5 and R6 are independently selected alkyl groups having 1 to 4 carbons.)

Dependencies are inferred from the claim text.