Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An electrically addressable release pad for use in a burst electrode drug release (delivery) system. The pad useable in this system comprises a polymer, preferably polypyrrole, which surrounds medicine. Once a section of the polymer receives an electrochemical potential sent from an electrode contained within the pad, a defined dose of medicine contained therein is released. The pad is designed to be worn by a patient, so that when the medication is released, its administered to the patient, without the patient having to do anything. The electrode typically can be a burst electrode, one with a unique electrical signature. The electrode can be triggered from a remote source.

Abstract: The invention herein comprises a polymer bilayer which eliminates the spontaneous release of an active molecule by ion exchange. The spontaneous release is slowed by the application of a second polymer layer to the top of the electroactive polymer. The electroactive bilayer is preferably polypyrrole. The second polymer layer is preferably poly(vinyl butyral), poly(vinyl acetate) or nafion. This second layer stops the spontaneous release of the active molecule. The active molecule will usually be a pharmaceutical agent or drug. This bilayer allows a more effective controlled drug delivery system wherein the quantities and timing of the drugs can be given to the human being/animal patient with a high degree of certainty and predictability.

Abstract: A burst electrode system is provided that comprises an electroactive polymer having thereon either a polyanionic or polycationic dopant, and a biologically active ingredient that is releasable from said electroactive polymer, whereby said burst electrode system exhibits a release profile greater in quantity and faster than a standard Faradaic profile. The biologically active ingredient preferably is a drug. The electroactive polymer preferably is a polypyrrole or a polypyrrole polyelectrolyte complex such as polypyrrole poly(styrene sulfonate), heparin or polyacrylic acid.