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:
Aug. 05, 2008
Filed:
Jun. 02, 2005
Hideo Ohira, Tajimi, JP;
Ryuji Kato, Ama-gun, JP;
Akihiko Taniguchi, Haguri-gun, JP;
Noriatsu Aoi, Ichinomiya, JP;
Masaya Fujioka, Nagoya, JP;
Shunichi Higashiyama, Yotsukaichi, JP;
Hideo Ohira, Tajimi, JP;
Ryuji Kato, Ama-gun, JP;
Akihiko Taniguchi, Haguri-gun, JP;
Noriatsu Aoi, Ichinomiya, JP;
Masaya Fujioka, Nagoya, JP;
Shunichi Higashiyama, Yotsukaichi, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
An ink set for ink-jet recording includes a pigment-based ink containing a negatively chargeable and self-dispersible pigment as a coloring agent and a dye-based ink containing an anionic dye as a coloring agent, and the ink set satisfies the following expression (1):<1.1×+0.0001  (1) wherein 'Dci' represents an amount of counter ion (mol/g) of the anionic dye contained in the dye-based ink, and 'Pci' represents an amount of counter ion (mol/g) of the self-dispersible pigment contained in the pigment-based ink. The pigment aggregation can be greatly suppressed, and the high quality printing can be stably performed when the ink set for ink-jet recording composed of the pigment-based ink and the dye-based ink is carried on an ink-jet printer provided with a conventional maintenance system that is simple and at low cost.