JET INK AND PROCESS FOR PREPARING DISPERSION OF COLORED FINE PARTICLES FOR JET INK

摘要

An aqueous jet ink which is excellent in dispersion stability and also in ink ejection properties and the fixation of images onto a recording medium. The ink comprises an aqueous medium and colored fine particles (d) dispersed in the aqueous medium, each particle (d) comprising a fine particle (a) of a pigment coated with a film-forming carboxylated resin (b), characterized in that (1) each particle (d) has a quaternized carboxyl group on its surface and a volume-average particle diameter of not more than 0.5 mu m and that (2) the percentage increase in volume-average particle diameter of the particles (d) in a redispersion of a dried ink is not more than 50 %.