Lightfast inks for ink-jet printing

Details Lightfast inks for ink-jet printing Lightfast inks for ink-jet printing

1996-10-30

1998-03-10

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Marking

534763, 534764, 534617, C09D 1102

Patent

active

057256411

ABSTRACT:
Aqueous inks are provided for use in vehicles employing from about 10 to about 40 wt % of one or more organic solvents; and optionally up to about 5 wt % of an additive independently selected from the group consisting of surfactant, buffer, biocide, and mixtures thereof. The inks comprise, by weight, from about 1 to about 10 wt % Reactive Black 31 dye in either or both of its hydrolyzed forms, namely vinyl sulfone form and ethyl hydroxy form. Ink-jet inks made using the Pacified Reactive Black 31 provide improved lightfastness across a range of printing media while providing reliable ink-jet pen performance.

REFERENCES:
patent: 4694302 (1987-09-01), Hackleman et al.
patent: 5062892 (1991-11-01), Halko
patent: 5102459 (1992-04-01), Ritter et al.
patent: 5118350 (1992-06-01), Prasad
patent: 5165968 (1992-11-01), Johnson et al.
patent: 5534051 (1996-07-01), Lauw
patent: 5536306 (1996-07-01), Johnson et al.

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