Process for improving dried film resistivity of a chemically modified carbon black dispersion
AssigneeScitex Digital Printing, Inc.
InventorsSharad R. Thakkar, Jing-Den Chen
Life of this patent
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Abstract
An ink jet ink composition comprises a liquid vehicle and a chemically modified pigment dispersion incorporating a chemical with a plurality of electron donating groups. The chemical is a monomer or a polymer. Dried ink film resistivity of aqueous carbon black pigment ink formulated in accordance with this composition is improved by being increased to a level whereby no electrical shorts which cause printer failure or print defects are observed during printing.
Claims8
An ink jet ink composition for a continuous ink jet printer, the ink jet ink composition comprising a liquid vehicle, a carbon black pigment dispersion, and a chemical for chemically modifying the pigment dispersion, the liquid vehicle, carbon black pigment dispersion, and modifying chemical capable of producing an ink jet ink having an ink film that increases electrical resistivity to prevent electrical charge shorts in the continuous ink jet printer.
An ink jet ink composition for use in a continuous ink jet printer, the ink jet ink composition comprising a liquid vehicle, a carbon black pigment dispersion, and at least one acrylate polymer, for formulating an ink jet ink composition having a high electrical resistivity.
Dependencies are inferred from the claim text.