Back to results
US 6,475,271 B2Granted
Ink jet ink compositions and printing processes
AssigneeXerox Corporation
InventorJohn Wei-Ping Lin
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeXerox Corporation
InventorJohn Wei-Ping Lin
Estimating the term…
A multicolor ink jet printing process employs an ink jet ink composition comprising water, a colorant of pigment, dye, or mixtures thereof, and a low boiling point additive to produce high quality multicolor ink jet images with minimal intercolor bleed and lines with sharp edges as characterized by a relatively low mid frequency line edge noise (MFLEN) number. The additive is an alcohol or thiol having a boiling point less than or equal to about 115° C. The aforementioned ink jet ink composition can further include an optional additive of alcohol or thiol with a boiling point less than or equal to about 135° C. if necessary. The desired additive increases the ink's drying rate with fast evaporation and an accelerated penetration into a print substrate (e.g. paper) upon printing. As a result, little or minimum residual ink (e.g. carbon black ink) comprising the aforementioned additive is available on the surface of the print substrate to intermix with a previously or subsequently printed ink (e.g. a color ink). As a result, the ink composition and multicolor ink jet printing process of the present invention can produce high quality images with minimal intercolor bleed and low MFLEN.
An ink jet printing process comprises printing a first ink and at least a second ink and a different colorant from the first ink onto a print substrate according to digital data signals in any desired printing order, wherein an ink jet composition of the first ink and second ink comprises water, a colorant, a first low boiling point penetrant additive having a boiling point less than or equal to about 115° C., and a second low boiling point penetrant having a boiling point of less than or equal to about 135° C.
A multicolor ink jet printing process comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Inks: inkjet printing inks
Inkjet printing inks: characterised by non-macromolecular additives other than solvents, pigments or dyes
Inkjet printing inks: ink-sets specially adapted for multi-colour inkjet printing
Coating compositions
Term ended 2 Jan 2021 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of Invention
The present invention is directed to an aqueous ink composition. More specifically, the present invention is directed to aqueous ink compositions comprising a low boiling point alcohol or thiol as a substrate penetrant additive for use in ink jet printing processes. In addition, the present invention is also directed to an ink jet printing process wherein an aqueous ink composition comprising a low boiling point alcohol or thiol is used in the production of single or multicolor images.
2. Description of Related Art
Specific embodiments of the invention will now be described in detail. These Examples are intended to be illustrative only, and the invention is not limited to the materials, conditions or process parameters set forth in these embodiments. All parts and percentages are by weight in inks, unless otherwise indicated. Other embodiments and modifications of the present invention may occur to those skilled in the art subsequent to a review of the information presented herein; these embodiments and modifications, as well as equivalents thereof, are also included within the scope of this invention.
A carbon black ink composition was prepared. The ink composition comprised the following components:
15.66% sulfolane,