Aqueous ink, ink cartridge and ink jet recording method

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United States of America Patent

PATENT NO 9593250
APP PUB NO 20150376427A1
SERIAL NO

14749820

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Abstract

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The invention provides an aqueous ink containing a coloring material, wherein the coloring material is a self-dispersible pigment in which a functional group containing another atomic group and an anionic group such as a carboxylic acid group, a sulfonic acid group, a phosphoric acid group or a phosphonic acid group are bonded to a particle surface of a pigment such as carbon black or an organic pigment, and a standard deviation of an introduced amount of the functional group is 0.0380 or less.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Higashi, Ryuji Kawasaki, JP 64 687
Mizutani, Takakazu Kawasaki, JP 4 26
Suzuki, Koichi Yokohama, JP 385 3810
Watanabe, Taiki Akishima, JP 47 179

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