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US 12,729,316 B2Granted
Water-based ink jet ink composition and ink jet recording method
AssigneeSeiko Epson Corporation
InventorsSena Gozu, Yuko Hishida, Kenta Uchida
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Abstract
A water-based ink jet ink composition contains C.I. Pigment Red 150 and at least one of 1-(2-hydroxyethyl)-2-pyrrolidone and ε-caprolactam.
Claims9
A water-based ink jet ink composition comprising:
- C.I. Pigment Red 150;
- 1-(2-hydroxyethyl)-2-pyrrolidone;
- and
- ε-caprolactam,
- wherein a content of the C.I. Pigment Red 150 is from 5.5% to 10% by mass relative to a total amount of the water-based ink jet ink composition, and
- wherein a total content of the 1-(2-hydroxyethyl)-2-pyrrolidone and ε-caprolactam is from 0.5% to 4.5% by mass relative to a total amount of the water-based ink jet ink composition.
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Dependencies are inferred from the claim text.