The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 04, 2014
Filed:
Aug. 13, 2012
Masashi Yamamoto, Yokohama, JP;
Shuichi Okazaki, Fujisawa, JP;
Kouhei Nakagawa, Kawasaki, JP;
Tsuyoshi Kasai, Tokyo, JP;
Masashi Yamamoto, Yokohama, JP;
Shuichi Okazaki, Fujisawa, JP;
Kouhei Nakagawa, Kawasaki, JP;
Tsuyoshi Kasai, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
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/cm)) determined by Fedors' method of 11.0 or more and 16.0 or less.