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US 10,647,140 B2Granted
Inkjet ink set with a pre-treatment fixing fluid
AssigneeHewlett-Packard Development Company, L.P.
InventorsAlireza Rahimi, George Sarkisian, Benjamin Abelovski, Gregg A. Lane, Tienteh Chen, Or Brandstein, Jun Yang, Olakemi Akinlabi
Life of this patent
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Abstract
An inkjet ink set containing a pre-treatment fixing fluid including calcium-containing crashing agents; at least a co-solvent; one or more surfactants and a balance of water; and, at least, a liquid ink. The liquid ink includes a pigment dispersion, a surfactant, a polyurethane binder, a co-solvent and a balance of water. Also disclosed are and inkjet printing system containing such ink set and the method for printing in such inkjet printing system.
Claims14
An inkjet ink set comprising:
- a. a pre-treatment fixing fluid including a combination of calcium-containing crashing agents consisting of i) from greater than 0 wt % to about 10 wt % of a metal carboxylate salt selected from the group consisting of calcium propionate salt, calcium acetate salt and calcium butyrate salt, and ii) from greater than 0 wt % to about 15 wt % of a water-soluble polyvalent metal salt selected from the group consisting of calcium nitrate, CaCl2, and Ca(OH)2, at least a co-solvent, a combination of surfactants consisting of i) from 0.05 wt % to about 1.5 wt % of a first surfactant having a hydrophilic lipophilic balance (HLB) less than about 6 and ii) from about 0 wt % to about 0.1 wt % of a second surfactant having an HLB greater than 6, and a balance of water;
- and
- b. a liquid ink including a pigment dispersion, a surfactant, a polyurethane binder, a co-solvent and a balance of water.
Dependencies are inferred from the claim text.