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US 2006/0065158 A1Published application
Versatile water-soluble dye-based ink-jet inks
AssigneeHewlett-Packard Development Company, L.P.
InventorLinda Uhlir-Tsang
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Abstract
The present invention is drawn to a pigment-free ink-jet ink and method of producing a printed image. The ink-jet ink can comprise an aqueous liquid vehicle including 1-(2-hydroxyethyl)-2-pyrrolidinone, and a colorant consisting essentially of a dye that is solubilized in the aqueous liquid vehicle.
Claims33
A pigment-free ink-jet ink, comprising:
- (a) an aqueous liquid vehicle including 1-(2-hydroxyethyl)-2-pyrrolidinone;
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- (b) a colorant consisting essentially of a dye that is solubilized in the aqueous liquid vehicle and
- (c) an aliphatic polyhydric alcohol co-solvent.
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A method of producing a printed image, comprising jetting an aqueous pigment-free ink-jet ink from an ink-jet pen, said ink-jet ink including:
- (a) an aqueous liquid vehicle including 1-(2-hydroxyethyl)-2-pyrrolidinone;
- (b) a colorant consisting essentially of a dye that is solubilized in the aqueous liquid vehicle and
- (c) an aliphatic polyhydric alcohol co-solvent.
Dependencies are inferred from the claim text.