Magenta inks
AssigneeHewlett-Packard Development Company, L.P.
InventorsLarrie Deardurff, Jr., Jayprakash C. Bhatt, Cory J. Ruud, Sterling Chaffins, Matthew Thornberry
Life of this patent
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Abstract
The present disclosure is drawn to a dispersed magenta pigment blend, including a first pigment including Pigment Violet 19 and Pigment Red 122, or Pigment Red 282; and a second pigment including Pigment Red 150. The weight ratio of the first pigment to the second pigment can be from 50:50 to 80:20 by pigment solids content.
Claims20
A co-dispersed magenta pigment blend, comprising:
- quinacridone pigment dispersed in a liquid, the quinacridone pigment, including:
- Pigment Violet 19 and Pigment Red 122, or
- Pigment Red 282;
- and
- azo pigment dispersed in the liquid, the azo pigment including Pigment Red 150,
- wherein the weight ratio of quinacridone pigment to azo pigment is from 50:50 to 80:20 by pigment solids content, and the quinacridone pigment and the azo pigment are co-dispersed in the liquid with one or more dispersing agents including a dispersing agent having an acid value from 50 to 300.
A method of formulating a dispersed magenta pigment blend, comprising co-dispersing a first pigment a second pigment together, wherein the first pigment has a stronger color strength in the red areas of CIE Color Coordinate Plot compared to its color strength in the blue areas, wherein the second pigment has stronger color strength in blue areas compared to its color strength in red areas, and wherein the first pigment and the second pigment are co-dispersed in a liquid with one or more dispersing agents including a dispersing agent having an acid value from 50 to 300, wherein the first pigment and the second pigment are included at a weight ratio to improve color strength in the blue areas compared to the first pigment and to improve color strength in the red areas compared to the second pigment.
Dependencies are inferred from the claim text.