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US 11,702,556 B2Granted
Aqueous ink, ink cartridge and ink jet recording method
AssigneeCanon Kabushiki Kaisha
InventorsYasuaki Murai, Kuniaki Fujimoto, Saki Tasaki
Life of this patent
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Abstract
Provided is an aqueous ink that excels in a hue as a yellow ink, and capable of recording an image that excels both in color developability and light fastness. The aqueous ink is an ink for inkjet, containing a first coloring material and a second coloring material. The first coloring material is a compound represented by general formula (1), and the second coloring material is a compound represented by general formula (2).
Claims15
An aqueous ink for ink jet comprising a first coloring material and a second coloring material,
- wherein the first coloring material is a compound represented by general formula (1), and
- the second coloring material is a compound represented by general formula (2):
- in general formula (1), M's each independently represent a hydrogen atom, alkali metal, ammonium or organic ammonium,
- in general formula (2), R1 and R2 each independently represent a hydrogen atom, —COOM or —SO3M, and M's each independently represent a hydrogen atom, alkali metal, ammonium or organic ammonium.
1 more element
Dependencies are inferred from the claim text.