Patent ID: 6505929
Filing Date: 2003-01-14
Classification: B41M

Abstract:
A method of improving resolution, color retention, waterfastness, smearfastness, image retention and image density while decreasing image bleed in ink-jet printing, comprising the steps of:(a) providing at least one ink-jet ink, said ink containing at least one colorant selected from the group consisting of anionic colorants and anionically dispersed pigments; (b) providing an ink-jet print medium containing (1) a base paper, and (2) a coating thereon, wherein said coating contains a binder and an inorganic pigment having a net positive charge, said net positive charge deriving from said inorganic pigment modified with a positively charged complex, said positively charged complex comprising a polyvalent metal ion and an organic ligand having a carboxylic acid group; and (c) printing said ink-jet ink onto said ink-jet print medium.