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:
Mar. 30, 2010
Filed:
Apr. 13, 2006
Junichiro Sugimoto, Toyoake, JP;
Masashi Tsuda, Ichinomiya, JP;
Ryuji Kato, Aisai, JP;
Narumi Koga, Nagoya, JP;
Masaya Fujioka, Nagoya, JP;
Shunichi Higashiyama, Yokkaichi, JP;
Junichiro Sugimoto, Toyoake, JP;
Masashi Tsuda, Ichinomiya, JP;
Ryuji Kato, Aisai, JP;
Narumi Koga, Nagoya, JP;
Masaya Fujioka, Nagoya, JP;
Shunichi Higashiyama, Yokkaichi, JP;
Abstract
A water-based ink for ink-jet recording and an ink-jet recording method allow the formation of sharp text and lines in high density black, and the formation of a high quality gradation image in which the graininess is reduced in a black image of a medium lightness to a high lightness (e.g., an achromatic image in dark gray to light gray) in ink-jet recording. The water-based ink combination for ink-jet recording comprises a black ink, and a color ink (A) and a color ink (B) that satisfy a color relationship of the following expression (I):about 120°≦|α−β|≦about 240°  (I)wherein α is the hue angle of the color ink (A) and β is the hue angle of the color ink (B).