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:
Jul. 13, 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;
Brother Kogyu Kabushiki Kaisha, Nagoya-shi, Aichi-ken, JP;
Abstract
A water-based ink for ink-jet recording enables the expression 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 medium to high lightness. The inks include a color ink (A) and a color ink (B) each of which independently has a lightness index L* according to the L* a* b* calorimetric system of about 60 or less. The color ink (A) and the color ink (B) satisfy 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). The chroma C* of a hue obtained by the combination of the color ink (A) and the color ink (B) is about 30 or less.