Xerox Corporation

Hiep Ly

David M Skinner

Pinyen Lin

Thomas W Smith

Daniel A Foucher

Richard L Colt

Kathleen M McGrane

Lisa A DeLouise

Erin M Reinhardt

Eric Pallen

Ming-Hong Fu

Michael Keymel

Garret Lau

An ink set for reducing intercolor bleed and a multi-colored ink jet printing process utilizing the same is provided. The ink set comprises a black ink composition and a plurality of color ink jet ink compositions comprising a colorant and an ink vehicle. The ink vehicle of at least one of the color inks matches the ink vehicle of the black ink. An ink set may also be a hybrid ink set comprising a black/color ink subset that includes a black ink composition and at least one color ink composition, and a color/color ink subset that includes a plurality of color ink compositions, wherein the ink vehicle of the color ink composition(s) in the black/color ink subset matches the ink vehicle of the black ink composition and the ink vehicles of at least one of the color inks in the color/color subsets match the ink vehicle of another color ink in the color/color ink subset.

Ink jet set for reducing intercolor bleed

Disclosed is an ink composition comprising water, a colorant, and sodium tetraphenylboride. Another embodiment of the present invention is directed to a set of inks for printing multicolor images in an ink jet printer, the ink set comprising (1) a first ink having a first color and comprising water, a first colorant, and at least one of (a) a cationic polymer, (b) a cationic surfactant, or (c) an inorganic salt the cation of which has a tetraphenylboride salt that is substantially insoluble in water, and (2) a second ink having a second color different from the first color and comprising water, a second colorant, and sodium tetraphenylboride, wherein intercolor bleed between the first ink and the second ink is reduced when the second ink is printed adjacent to, on top of, or underneath the first ink on a print substrate.

Ink compositions containing sodium tetraphenylboride

Process for producing a corrosion-resistant liquid level control plate for the printhead of an aqueous ink jet printing machine. A corrosion-resistant metal alloy base is used, having an undersurface and an upper surface and having closely-spaced ink jet nozzles therethrough. Each of the nozzles has a micro-orifice at the undersurface surrounded by a lip area at the bottom of upwardly and outwardly tapered walls opening at the upper surface. The present process comprises forming the lip areas of metallic gold, encapsulating the upper surface of the metal alloy base including the gold lip areas and the tapered walls with metallic gold to form a corrosion-resistant, hydrophobic surface layer thereover. Thereafter the undersurface is coated with metallic chromium to render it hydrophilic. The gold coating preferably is reacted with a self assembled monolayer (SAM) of an organic sulfur compound such as hexadecylthiol or, more preferably, a cross-linkable SAM which is then cross-linked in situ to form a rub-resistant layer having strong hydrophobic properties. The chrome coating on the undersurface may be coated with a hydrophilic silane to increase its hydrophilic properties.

Corrision resistant hydrophobic liquid level control plate for printhead of ink jet printer and process

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Webster, NY, United States of America

Hiep Ly