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US 11,639,061 B2Granted
Ink jet ink composition, ink pack, and ink jet printing method
AssigneeSeiko Epson Corporation
InventorsNao Kozaka, Yuki Wakushima, Yoshitaka Miyajima, Takeshi Yano, Chitae Hashizume
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Abstract
An ink jet ink composition contains a dye having an azo group, water, and a hindered amine compound having a radical. The dissolved nitrogen concentration of the ink composition is 10 ppm or less.
Claims10
An ink jet ink composition, comprising:
- a dye having an azo group;
- water;
- and
- a hindered amine compound having a radical,
- wherein the ink jet composition has a dissolved nitrogen concentration of 10 ppm or less;
- wherein an amount of hindered amine compound is in a range of 1.0 to 10 % by mass.
3 more elements
Dependencies are inferred from the claim text.