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US 10,947,398 B2Granted
White ink, printed matter, method of printing, and device for printing
AssigneeRicoh Company, Ltd.
InventorKoji Katsuragi
Life of this patent
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Abstract
A white ink includes a hollow resin particle, an organic solvent, an acrylic silicone resin, and water, wherein the acrylic silicone resin has a resin solubility parameter smaller than that of the hollow resin particle.
Claims15
A white ink comprising:
- a hollow resin particle;
- an organic solvent;
- an acrylic silicone resin;
- and
- water,
- wherein the acrylic silicone resin has a resin solubility parameter smaller than a resin solubility parameter of the hollow resin particle,
- wherein an amount of the hollow resin particles in the white ink is from 8.5 to 10% by mass, based on the white ink,
- wherein the resin solubility parameter of the hollow resin particle is 9 to 11 (cal/cm3)0.5, and
- wherein the resin solubility parameter of the acrylic silicone resin is 8 to 10 (cal/cm3)0.5.
6 more elements
Printed matter comprising:
- a substrate having a smoothness of 120 seconds or less as measured by an Oken smoothness tester;
- and
- a white printed layer including a hollow resin particle, an organic solvent, and acrylic silicone resin,
- wherein the acrylic silicone resin has a resin solubility parameter smaller than a resin solubility parameter of the hollow resin particle,
- wherein the resin solubility parameter of the hollow resin particle is 9 to 11 (cal/cm3)0.5, and
- wherein the resin solubility parameter of the acrylic silicone resin is 8 to 10 (cal/cm3)0.5, and
- wherein the hollow resin particle has a permeation depth of 1 to 25 μm to the substrate.
4 more elements
Dependencies are inferred from the claim text.