WATER-BASE BLACK INK COMPOSITION AND COLORED MATERIAL

摘要

A water-base black ink composition comprising a water soluble black dye exhibiting ozone resistance (A) and a condensate compound (B) from 4,4'- dinitrostilbene-2,2'-disulfonic acid and aminobenzenes or a reduction produc t (C) of the compound (B). This ink composition is suitable for use in inkjet recording, and realizes neutral hue and black of high printing density. Further, the print obtained therewith excels in ozone gas resistance, light fastness, moisture resistance and color rendering properties. Still further, the storage stability as a recording liquid of the ink composition is excellent.