Iris Graphics, Inc.

Donald R Allred

Foster M Fargo, Jr

John L Ingraham

Edward J Johnson

Thomas A Davis

A mordanting substrate is provided including a porous substrate, and, distributed within the substrate, a mordanting agent. Preferably, the substrate is a fibrous cellulosic material, and the mordanting agent is a cationic polymer that is soluble in polar solvents, preferably water-soluble. The polar solvent solubility of the polymer, in combination with the porosity and cellulosic nature of the material, has been found to cause the mordanting agent, when imbibed into the substrate in the form of a solution, to bind to fibers within the substrate. This binding in turn allows excellent immobilization of dye within the substrate.

Mordanting substrates and agents

An ink jet printer comprising a plurality of ink jets arranged for dot-on-dot continuous ink jet printing, at least two of said plurality of ink jets being supplied with ink of the same dye and different densities. A printed article and a method of printing are also disclosed.

Dot on dot ink jet printing using inks of differing densities

A deflection electrode for use in a continuous ink jet printing device molded of powdered ultra high molecular weight polyethylene combined with carbon black and subjected to oxygen plasma treatment.

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Westford, MA, United States of America

Donald R Allred