Water base ink for ink-jet recording and ink-jet recording apparatus provided with the same

1. Field of the Invention A water base ink for ink-jet recording, which is usable for an ink-jet recording apparatus having an ink-jet head provided therein with an ink flow passage formed of nickel or nickel alloy, includes a coloring agent, water, and a water-soluble organic solvent. The ink is bl...

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Main Authors Okada, Mayuko, Koga, Narumi, Goto, Kazuma, Sago, Hiromitsu, Yamazaki, Hideto, Kobayashi, Kazuo, Hoshi, Tatsunosuke, Aoyama, Michiko, Ohira, Hideo, Higashiyama, Shunichi, Fujioka, Masaya, Toyoda, Yoshito
Format Patent
LanguageEnglish
Published 31.08.2004
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Summary:1. Field of the Invention A water base ink for ink-jet recording, which is usable for an ink-jet recording apparatus having an ink-jet head provided therein with an ink flow passage formed of nickel or nickel alloy, includes a coloring agent, water, and a water-soluble organic solvent. The ink is blended so that a current density, which is obtained within an electric potential range of −600 to +300 mV, is not more than 100 A/cmwhen anodic polarization measurement is performed by using a reference electrode of silver/silver chloride, a counter electrode of platinum, and a working electrode of nickel or nickel alloy. The ink does not corrode any part for constituting the flow passage in the ink-jet head.