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.

Date of Patent:
Sep. 02, 2014

Filed:

Mar. 22, 2012
Applicants:

Misato Sasada, Kanagawa, JP;

Jun Matsumoto, Kanagawa, JP;

Inventors:

Misato Sasada, Kanagawa, JP;

Jun Matsumoto, Kanagawa, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/01 (2006.01); C09D 11/00 (2014.01); B41J 2/21 (2006.01); C09D 11/10 (2014.01); B41J 11/00 (2006.01);
U.S. Cl.
CPC ...
C09D 11/324 (2013.01); B41J 2/2107 (2013.01); B41J 11/002 (2013.01); C09D 11/101 (2013.01); C09D 11/40 (2013.01); C09D 11/54 (2013.01);
Abstract

A black ink composition includes a resin-coated carbon black containing a water-soluble resin and carbon black, a water-soluble polymerizable compound, a polymerization initiator, and water, wherein an average primary particle diameter of the carbon black is 20 nm or more, and an absorbance ratio of absorbance at a wavelength of 350 nm with respect to absorbance at a wavelength of 600 nm (absorbance at a wavelength of 350 nm/absorbance at a wavelength of 600 nm), when the black ink composition is diluted 5,000-fold with water, is 1.9 or lower.


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