Electrophotographic ink compositions
AssigneeHewlett-Packard Development Company, L.P.
InventorsDoron Gurovich, Vladislav Kaploun, Albert Teishev, Emad Masoud
Life of this patent
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Abstract
A method of producing a liquid electrophotographic ink composition includes combining a pigment with a charge director in a carrier liquid to produce a pigment dispersion; and combining a thermoplastic resin with the pigment dispersion to produce a liquid electrophotographic ink composition; wherein the charge director comprises a metal salt of a sulfonic acid. A method of printing the liquid electrophotographic ink composition and a printing set comprising the liquid electrophotographic ink composition are also included.
Claims11
A method of producing a liquid electrophotographic ink composition, comprising:
- combining a pigment with a charge director in a carrier liquid, and grinding the pigment with the charge director to produce a pigment dispersion including a pre-treated pigment therein;
- combining a thermoplastic resin with the carrier liquid to produce a thermoplastic resin paste;
- and
- combining the thermoplastic resin paste, the pigment dispersion, a charge adjuvant, and the carrier liquid, and grinding the thermoplastic resin paste, the pigment dispersion, and the charge adjuvant to produce a liquid electrophotographic ink composition;
- wherein the charge director consists of a metal salt of a sulfonic acid.
Dependencies are inferred from the claim text.