Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Narumi Koga0
Shunichi Higashiyama0
Hideo Ohira0
Hiromitsu Sago0
Kazuma Goto0
Masaya Fujioka0
Date of Patent
July 24, 2007
0Patent Application Number
106451970
Date Filed
August 21, 2003
0Patent Primary Examiner
Patent abstract
A water base ink for ink-jet recording is provided, which makes it possible to secure a high recording quality with a sharp image area edge by avoiding any blurring even when recording is performed on regular paper and which has satisfactory purge restoration performance. Therefore, no bubble remains in an ink flow passage, and no discharge failure is caused. Further, the discharge operation never becomes unstable. In the water base ink for ink-jet recording, the surface tension is not less than 40 mN/m, and the amount of dissolved oxygen is not more than 4 mg/L.
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