Ink-jet printing methods and systems providing improved...

Details Ink-jet printing methods and systems providing improved... Ink-jet printing methods and systems providing improved...

2007-01-02

2007-01-02

Shosho, Callie (Department: 1714)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S523000, C524S548000, C524S555000, C524S556000

Reexamination Certificate

active

10261441

ABSTRACT:
Systems and methods for providing smudge resistant and durable ink-jet images having good optical density are provided. Specifically, a system for printing durable ink-jet ink images can comprise a set of two ink-jet pens, preferably thermal ink-jet pens. The first ink-jet pen contains an ink-jet ink, wherein the ink-jet ink comprises a first liquid vehicle, from 0.5% to 6% by weight of a pigment colorant, and from 0.2% to 15% by weight of an anionic or neutral latex-containing colloidal suspension. The second ink-jet pen contains a fixer composition, wherein the fixer composition comprises effective amounts of second liquid vehicle, and from 0.2% to 15% by weight of a cationic polymer such as poly(vinyl pyridine) salts, polyalkylaminoethyl acrylates, polyalkylaminoethyl methacrylates, poly(vinyl imidazole); or preferably, polyethyleneimines, polybiguanides, and/or polyguanides. When applied to the substrate, upon overprinting or underprinting the fixer composition with respect to the ink-jet ink, a durable and smudge resistant image is formed. A method of the present invention can utilize the system and provide for underprinting or overprinting the fixer composition as desired.

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