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IMPROVED COLOR DYE SETS FOR THERMAL INK JET PRINTING

IP.com Disclosure Number: IPCOM000027567D
Original Publication Date: 1997-Dec-31
Included in the Prior Art Database: 2004-Apr-08
Document File: 2 page(s) / 70K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed are thermal ink jet inks with specific dye sets which yield true, vivid colors on a variety of substrates such as paper, transparency material, or the like. Specifically, the dye sets of the invention provide more vivid colors and truer colors than many other combinations of dyes and also provide excellent color purity and high extinction coefficients. In addition, the inks disclosed herein exhibit improved lightfastness compared to many other combinations of dyes.

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XEROX DISCLOSURE JOURNAL

IMPROVED COLOR DYE SETS FOR THERMAL INK JET PRINTING William M. Schwarz, Jr.

Proposed Classification

U. S. C1. 106/20R Int. C1. C09d 11/00

Disclosed are thermal ink jet inks with specific dye sets which yield true, vivid colors on a variety of substrates such as paper, transparency material, or the like. Specifically, the dye sets of the invention provide more vivid colors and truer colors than many other combinations of dyes and also provide excellent color purity and high extinction coefficients. In addition, the inks disclosed herein exhibit improved lightfastness compared to many other combinations of dyes.

The specific dye sets are as follows:

Set 1:

Yellow: pyridone dye (as disclosed in, for example, U.S. Patent 5,413,630) Magenta: benzodifuranone dye (as disclosed in, for example, U.S. Patent 5,665,150) Cyan: Direct Blue 199 and/or Acid Blue 9

Set 2:

Yellow: Acid Yellow 23 dye Magenta: benzodifuranone dye Cyan: Direct Blue 199 and/or Acid Blue 9

Set 3:

Yellow: pyridone dye Magenta: rhodamine dye Cyan: Direct Blue 199 and/or Acid Blue 9

Set 4:

Yellow: pyridone dye Magenta: benzodifuranone dye Cyan: solubilized anthraquinone dye

The dyes are used in any desired or suitable ink vehicle, including water, and optionally also including any desired humectants, surfactants, penetrants, drying agents, cosolvents, or the like.

XEROX DISCLOSURE JOURNAL - Vol. 22, No. 6 NovembedDecember 1997 215

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