Versatile pigmented ink-jet inks with improved image quality
AssigneeHewlett-Packard Development Company, L.P.
InventorsAnne M. Kelly-Rowley, Zeying Ma, David M. Mahli, Peter C. Morris, John M. Gardner
Life of this patent
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Abstract
The present invention is drawn to versatile ink-jet inks, ink-jet ink sets, and methods of printing images with improved quality when printed on both glossy coated media and on plain paper. In accordance with these embodiments, an ink-jet ink formulated for printing on plain paper and glossy coated media can comprise a liquid vehicle including water, an organic solvent, and an organic amine; and a polymer-encapsulated, acid-sensitive pigment colorant dispersed the liquid vehicle.
Claims35
An ink-jet ink formulated for printing on plain paper and glossy coated media, comprising:
- a liquid vehicle including water, an organic solvent, and an organic amine;
- a polymer-encapsulated, acid-sensitive pigment colorant dispersed in the liquid vehicle, and
- a polymer binder prepared using at least one of the same monomers used to prepare the polymer-encapsulated, acid-sensitive pigment colorant;
- wherein the ink-jet ink provides an increase of at least 5 gloss units over a comparative ink, said comparative ink having the same components of the ink-jet ink but without the organic amine.
A method of printing images, comprising:
- a) jetting a first ink-jet ink onto a media substrate, said first ink-jet ink, comprising:
- i) a liquid vehicle including water, an organic solvent, and an organic amine, and
- ii) a polymer-encapsulated, acid-sensitive pigment colorant dispersed in the liquid vehicle;
- and
- b) jetting a second ink-jet ink onto the media substrate such that the first ink jet ink and the second ink-jet ink become blended on the media substrate, wherein the second ink-jet ink includes an ionic pigment colorant or a pigment colorant associated with an ionic pigment dispersant.
Dependencies are inferred from the claim text.