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US 11,186,737 B2Granted
Ink and printing method
AssigneeRicoh Company, Ltd.
InventorsTomohiro Nakagawa, Hiroki Hagiwara, Yuutaroh Nonaka, Kazuhiko Umemura
Life of this patent
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Abstract
An ink includes water, a compound represented by the following Chemical formula 1, Pigment Red 269 represented by the following Chemical formula 2, and alkylene glycol alkyl ether, wherein the proportion of the compound represented by the following Chemical formula 1 in a total amount of the Pigment Red 269 is 2 or less percent by mass.
Claims13
An ink comprising:
- water;
- a compound represented by the following Chemical formula 1;
- Pigment Red 269 represented by the following Chemical formula 2;
- and
- alkylene glycol alkyl ether,
- wherein a proportion of the compound represented by the following Chemical formula 1 in a total amount of the Pigment Red 269 is greater than 0 percent by mass and less than 2 percent by mass
3 more elements
Dependencies are inferred from the claim text.