BLEED CONTROL USING CATIONIC DYES AS DISPERSANT IN PIGMENT DISPERSIONS

摘要

An ink system comprising a first aqueous ink comprising a cationic pigment dispersion comprising a cationic dye and a pigment, and a second aqueous ink comprising an anionic dispersion comprising an anionic dispersant. The ink system reduces bleed between the two inks when they are applied side by side. The anionic dispersion in the second aqueous ink flocculates the cationic pigment dispersion in the first aqueous ink.