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US 9,803,093 B2Granted
White ink, ink set, and inkjet recording method
AssigneeRicoh Company, Ltd.
InventorKoji Katsuragi
Life of this patent
Estimating the term…
Abstract
A white ink includes a hollow resin particle, one or more first organic solvents, an acrylic silicone-based resin, a surfactant; and water. The luminosity (L*) of each of a first dried film having a thickness of 2.2-2.8 μm prepared by drying the white ink at 70 degrees C. and a second dried film having a thickness of 2.2-2.8 μm prepared by drying the white ink at 90 degrees C. is 50 or greater and the decrease ratio of the luminosity (L*) of the second dried film to the first dried film is 10 percent or less.
Claims10
A white ink comprising
- a hollow resin particle;
- one or more first organic solvents;
- an acrylic silicone-based resin;
- a surfactant;
- and
- water,
- wherein luminosity (L*) of each of a first dried film having a thickness of 2.2-2.8 μm prepared by drying the white ink at 70 degrees C. and a second dried film having a thickness of 2.2-2.8 μm prepared by drying the white ink at 90 degrees C. is 50 or greater and
- wherein a decrease ratio of the luminosity (L*) of the second dried film to the first dried film is 10 percent or less.
5 more elements
An ink set comprising:
- a white ink including a hollow resin particle, one or more first organic solvents, an acrylic silicone-based resin, a surfactant, and water;
- and
- an ink including a coloring material, a second organic solvent, and water,
- wherein luminosity (L*) of each of a first dried film having a thickness of 2.2-2.8 μm prepared by drying the white ink at 70 degrees C. and a second dried film having a thickness of 2.2-2.8 μm prepared by drying the white ink at 90 degrees C. is 50 or greater and wherein a decrease ratio of the luminosity (L*) of the second dried film to the first dried film is 10 percent or less.
1 more element
An inkjet recording method comprising:
- applying thermal energy or mechanical energy to a white ink and an ink of an ink set to discharge the white ink and the ink onto a recording medium;
- and
- drying the white ink and the ink on the recording medium wherein the white ink includes a hollow resin particle, one or more first organic solvents, an acrylic silicone-based resin, a surfactant, and water;
- and the ink includes a coloring material, a second organic solvent, and water,
- wherein luminosity (L*) of each of a first dried film having a thickness of 2.2-2.8 μm prepared by drying the white ink at 70 degrees C. and a second dried film having a thickness of 2.2-2.8 μm prepared by drying the white ink at 90 degrees C. is 50 or greater and
- wherein a decrease ratio of the luminosity (L*) of the second dried film to the first dried film is 10 percent or less.
3 more elements
Dependencies are inferred from the claim text.