Patent ID: 6468337
Filing Date: 2002-10-22
Classification: C09D

Abstract:
A set of inks for printing multicolor images in an ink jet printer, said ink set consisting of (1) a first ink having a first color and comprising water and an anionic dye; (2) one second ink having a second color different from the first color and comprising (a) water, and (b) pigment particles having chemically bonded to the surfaces thereof moieties containing amine or quaternary amine functional groups; and (3) optional additional inks each having a color different from the first color and the second color and comprising water and an anionic dye, wherein the anionic dyes in the first ink and optional additional inks are capable of being immobilized on a printing substrate by interaction with the pigment particles in the second ink, thereby enabling reduced intercolor bleed.