Water base ink set for ink-jet recording

Details Water base ink set for ink-jet recording Water base ink set for ink-jet recording

2007-10-30

2007-10-30

Klemanski, Helene (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031280, C106S031600

Reexamination Certificate

active

11217456

ABSTRACT:
In a water base ink set for ink-jet recording including a pigment-based black ink and a dye-based yellow ink, a first water-soluble dye in which a number of counter ion or ions per one molecule is not more than 3 and a hue angle h* is 95° to 105° is used, as the dye used in the yellow ink, together with a second water-soluble dye in which a number of counter ion or ions per one molecule is not more than 3 and a hue angle h* is 75° to 85°; or 30° to 70°; or 0° to 30° or 350° to 360°. When the ink set is applied to a general ink-jet printer with a simple maintenance system, the coagulation of black pigment in the printer and the blurring or bleeding on the printing paper are prevented, thereby realizing a satisfactory and complex coloring of the dye-based yellow ink.

REFERENCES:
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patent: 5745140 (1998-04-01), Stoffel et al.
patent: 6386695 (2002-05-01), Kowalski
patent: 6631974 (2003-10-01), Shindo
patent: 2005/0235868 (2005-10-01), Goto et al.
patent: 2006/0119681 (2006-06-01), Sugimoto et al.
patent: 2006/0268084 (2006-11-01), Nishizaki et al.
patent: B 3089665 (2000-07-01), None
patent: A 2002-173623 (2002-06-01), None
patent: A 2002-234151 (2002-08-01), None

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