Patent ID: 8246155

Claim:
A metallic inkjet ink system, comprising: a fixer, including: an aqueous vehicle; and at least one film-forming material selected from 4-methylmorpholine-N-oxide, poly[bis(2-chloroethyl)ether-alt-1,3-bis[3-(dimethylamino)propyl]urea], poly(2-ethyl-2-oxazoline), poly(acrylamide-co-diallyldimethylammonium chloride), dendrimers, alkyl phenols, cyclodextrin polymers, silicone polymers, dehydroxanthan gum, polymers having a terminal hydrophobic hydrocarbon group, polymers having a polyalkylene oxide group linked to a urethanyl group via a polyoxyalkyl amine group, and combinations thereof; and at least one metallic ink; wherein the fixer is substantially colorless, and is configured to enhance durability, permanence, or combinations thereof of the at least one metallic ink when both are printed on a substrate.