Patent ID: 7157504

Claim:
A system for printing durable ink-jet ink images, comprising: a) a first ink-jet pen containing an ink-jet ink, said ink-jet ink comprising i) a first liquid vehicle, ii) from 0.5% to 6% by weight of a pigment colorant, iii) from 0.2% to 15% by weight of an anionic or neutral latex-containing colloidal suspension, wherein the latex-containing colloidal suspension comprises polymeric particulates having a particle size range from about 20 nm to 500 nm, and iv) from 0.1% to 5% by weight of latex primer; and b) a second ink-jet pen containing a fixer composition, said fixer composition comprising i) a second liquid vehicle, and ii) from 0.2% to 15% by weight of a cationic polymer selected from the group consisting of poly(vinyl pyridine) salts, polyalkylaminoethyl acrylates, polyalkylaminoethyl methacrylates, poly(vinyl imidazole), polyethyleneimines, polybiguanides, and polyguanides, wherein, upon overprinting or underprinting the fixer composition with respect to the ink-jet ink on a substrate, a durable and smudge resistant image is formed.