Patent ID: 6777462
Filing Date: 2004-08-17
Classification: C09D

Abstract:
A set of inks for printing multicolor Images in an ink jet printer, said ink set comprising (1) a first ink having a first color and comprising water, a first colorant which is an anionic dye, and at least one of (a) a cationic polymer, (b) a cationic surfactant, or (c) an inorganic salt the cation of which has a tetraphenylboride salt that is substantially insoluble in water; and (2) a second ink having a second color different from the first color and comprising water, a second colorant, and sodium tetraphenylboride, wherein intercolor bleed beiween the first ink and the second ink is reduced when the second ink is printed adjacent to, on top of, or underneath the first ink on a print substrate.