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:
Dec. 26, 2023
Filed:
Sep. 23, 2021
Yuusuke Koizuka, Kanagawa, JP;
Naoto Shimura, Tokyo, JP;
Nozomi Terai, Tokyo, JP;
Tatsuya Takarada, Kanagawa, JP;
Yuusuke Koizuka, Kanagawa, JP;
Naoto Shimura, Tokyo, JP;
Nozomi Terai, Tokyo, JP;
Tatsuya Takarada, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
Provided is an ink set including standard ink and light ink. Standard ink includes cyan, magenta, and yellow inks. Light ink includes a light cyan or light magenta ink, or both. The pigment concentration in cyan ink is 1.9% by mass or greater but 3.6% by mass or less. The pigment concentration in light cyan ink is 0.4% by mass or greater but 1.4% by mass or less. The pigment concentration in magenta ink is 1.9% by mass or greater but 3.6% by mass or less. The pigment concentration in light magenta ink is 0.4% by mass or greater but 1.4% by mass or less. The light ink contains water, organic solvent, and resin. The organic solvent contains amide compound represented by General formula (1). In General formula (1), R, R, and Reach represent a hydrocarbon group containing from 1 through 8 carbon atoms.