Aqueous ink, ink cartridge, and ink jet recording method

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United States of America Patent

PATENT NO 8876962
SERIAL NO

13572838

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Abstract

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Provided is an aqueous ink capable of recording an image achieving a high level of both of color developability and lightfastness. The aqueous ink includes a first pigment and a second pigment. The first pigment is C.I. Pigment Yellow 213, and the second pigment is at least one selected from the group consisting of C.I. Pigment Yellows 93, 128, 138, 151, 155, 180, and 215. The content A (% by mass) of the first pigment and the content B (% by mass) of the second pigment based on a total mass of the ink satisfy a relationship of 0.1≦A/(A+B)≦0.9. The ink further includes a water-soluble organic solvent having an SP value (unit: (cal/cm3)1/2) determined by Fedors' method of 11.0 or more and 16.0 or less.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kasai, Tsuyoshi Tokyo, JP 7 17
Nakagawa, Kouhei Kawasaki, JP 23 188
Okazaki, Shuichi Fujisawa, JP 13 145
Yamamoto, Masashi Yokohama, JP 158 2080

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