Rexam Graphics, Inc.

Rexham Graphics Inc.

Barbara Jones Stewart

Richard S Himmelwright

Boris J Katsen

Nate R Schwartz

Dene H Taylor

Eran (Ron) Turi

Cynthia F Klausner

John Cavanaugh

Edward W Sporbert

Provided is a black ink jet ink which exhibits excellent non-fading properties. The ink jet ink is comprised of water, carbon black, cyan and magenta pigments, a water immiscible organic compound exhibiting a high boiling point, and a water miscible compound. The combination of the water immiscible compound and the water miscible compound provides for excellent anti-crusting properties.

Black ink jet ink composition

Provided is an ink jet ink comprised of water, pigment, a water immiscible organic compound exhibiting a high boiling point, and a water miscible compound. The combination of the water immiscible compound and the water miscible compound provides for excellent anti-crusting properties, and provides an ink which upon printing makes a round dot, and which printed images exhibit excellent waterfastness, lightfastness and wet rub resistance.

Ink jet ink composition

Provided is an ink jet ink comprised of water, a pigment, a polymeric electrolyte, preferably a sodium, potassium or lithium salt of a polymeric carboxylic acid, a polyhydric alcohol and a stearate, preferably aluminum stearate. The presence of the stearate, particularly in combination with the polymeric electrolyte, provides one with an ink jet ink which upon printing makes a perfectly round dot located only on the surface of the paper. The image also dries very quickly, is of high density and is waterfast. Printing problems are also avoided, such as plugging. The process for preparing the foregoing ink jet ink comprises comminuting a formulation containing the components followed by a separation step. The separation step is important to provide a stable dispersion of the ink formulation.

Ink jet ink and process for making same

Provided is a composite material comprising a carrier, a conductive layer formed on the carrier, and a dielectric layer containing spacer particles formed on the conductive layer. The dielectric layer has an abrasion factor less than about 0.3 determined by a brass shim abrasion method, and a substantially uniform distribution of spacer particles substantially free of flat spots greater than about 100 microns in the x-y direction and 1500 square microns in area on any part of the surface. The spacer particles of the dielectric layer of the composite material preferably are amorphous silica. The composite material is useful in electrostatic imaging technology and provides images substantially free of defects, including artifacts or flares, dropouts and nib writing. Also provided is a process which permits the creation of very stable dispersions of solid particles in a dispersing medium useful for both the dielectric and conductive layers of the composite material of the invention. A white or colored conductive ground plane is also provided.

Growing community of inventors

Springfield, MA, United States of America

Barbara Jones Stewart