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US 7,677,714 B2Granted
Inkjet inks providing improved wet smudge on porous print media
AssigneeHewlett-Packard Development Company, L.P.
InventorsGeorge Sarkisian, Xiaohe Chen, Keshava A. Prasad
Life of this patent
Estimating the term…
Abstract
A printing system for use in inkjet printing. The printing system includes an inkjet ink having a free binder, an additional free binder, and a chemically modified pigment, a fixer fluid and a porous print medium.
Claims23
A printing system providing increased resistance to wet smudge, comprising:
- an inkjet ink comprising a first free binder, an additional free binder and a chemically modified pigment, the chemically modified pigment comprising a polymer having a molecular weight equal to or greater than approximately 4000 chemically attached to a surface of a pigment, a charge on the first free binder and the additional free binder being the same as a charge on the polymer of the chemically modified pigment, and a molecular weight ratio of the free binder and the additional free binder ranging from approximately 0.001 to approximately 10;
- a fixer fluid;
- and
- a porous print medium having a surface that is modified by the fixer fluid.
1 more element
The printing system 1, wherein the polymer attached to the surface of the pigment has a molecular weight ranging from approximately 4000 to approximately 17500.
A method of producing a printed image having increased resistance to wet smudge, comprising:
- providing a porous print medium;
- applying an inkjet ink to the porous print medium, the inkjet ink comprising a first free binder, an additional free binder, and a chemically modified pigment having a polymer chemically attached to a surface of the pigment, the polymer having a molecular weight equal to or greater than approximately 4000 and a molecular weight ratio of the free binder and the additional free binder ranging from approximately 0.001 to approximately 10;
- and
- applying a fixer fluid to the porous print medium to modify a surface of the porous print medium.
1 more element
Dependencies are inferred from the claim text.