Ink set for color ink-jet recording, and recording method, recording apparatus, ink cartridge, recording unit and reduction of bleeding, employing the ink set
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United States of America Patent
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Sep 24, 2002
Grant Date -
N/A
app pub date -
Sep 29, 2000
filing date -
Sep 30, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
An ink set for recording a color image with inks of two or more colors including at least one black ink and one color ink on a recording medium is provided. The ink set includes a black ink containing a self-dispersible carbon black having at least one cationic group bonded directly or through another atomic group to the surface thereof, and a color ink containing an anionic substance and having a buffering capability against a pH change. The ink set satisfies the requirements for print quality, image durability, and so forth and does not cause bleeding between a black ink-printed area and a color ink-printed area.
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