Recording ink, ink cartridge containing the same, and ink-jet re

Details Recording ink, ink cartridge containing the same, and ink-jet re Recording ink, ink cartridge containing the same, and ink-jet re

1997-04-09

1999-03-23

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 3132, 106 316, 106 3164, C09D 1102

Patent

active

058853367

ABSTRACT:
A recording ink composition comprises pure water, a water-soluble dye, a polyvalent alcohol, and phosphoric acid. When iron is contained as an impurity in the recording ink composition, the iron and phosphoric acid form a ferric (III) phosphato complex ion represented by ion, the recording ink composition is prevented from discoloration which would be otherwise caused by iron ion. Further, the recording ink composition is prevented from formation and deposition of iron compounds. Therefore, the obtained ink has an excellent color tone, and the ink avoids blocking at a nozzle of a printing head or the like of an ink-jet printer.

REFERENCES:
patent: 4285727 (1981-08-01), Uehara et al.
patent: 4775416 (1988-10-01), Bevege et al.
patent: 5441561 (1995-08-01), Chujo et al.
patent: 5637138 (1997-06-01), Yamazaki
patent: 5645630 (1997-07-01), Yamazaki
patent: 5656072 (1997-08-01), Kato et al.
patent: 5755861 (1998-05-01), Fujioka et al.

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