Aqueous ink-jet inks for printing on commercial offset coated media
AssigneeHewlett-Packard Development Company, L.P.
InventorsMark L. Choy, John R Moffatt, Joseph W Tsang
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Abstract
An aqueous ink-jet ink composition for printing on offset media is disclosed comprising an ink colorant, an effective amount of at least one surfactant, and an effective amount of at least one aprotic polar solvent wherein the solvent is comprised of molecules having a molecular weight from 40 to 1500. Optionally, an effective amount of a non-aprotic polar solvent can be added. The aqueous ink-jet inks of the present invention are effective for printing on many commercially available offset papers and other media.
Claims24
An aqueous ink-jet ink composition for printing on offset media comprising:
- a) an ink colorant;
- b) at least one surfactant;
- and
- c) at least one aprotic polar solvent wherein the solvent is comprised of molecules having a molecular weight from 40 to 1500, said composition being configured to be ink-jetted on offset media to form an image without substantial coalescence.
An aqueous ink-jet ink composition for printing on offset media comprising:
- a) from 2% to 6% of an ink colorant by weight;
- b) from 1% to 10% of surfactant;
- c) from 5% to 40% of aprotic polar solvent comprised of molecules having molecular weights from 40 to 1500;
- and
- d) from 1% to 40% of non-aprotic polar solvent comprised of molecules having molecular weights from 40 to 1500, said composition being configured to be ink-jetted on offset media to form an image without substantial coalescence.
An aqueous ink-jet system for printing on offset media comprising:
- a) coated offset media;
- and
- b) an aqueous ink-jet ink composition including:
- i) at least one ink colorant;
- ii) at least one surfactant;
- and
- iii) at least one aprotic polar solvent wherein the solvent is comprised of molecules having a molecular weight from 40 to 1500, said composition being configured to be ink-jetted on the offset media to form an image.
Dependencies are inferred from the claim text.