Bleed-alleviated, waterfast, pigment-based ink-jet ink compositi

Details Bleed-alleviated, waterfast, pigment-based ink-jet ink compositi Bleed-alleviated, waterfast, pigment-based ink-jet ink compositi

1995-09-14

1996-07-02

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 20D, C09D 1102

Patent

active

055318169

ABSTRACT:
Bleed control and fast dry times are achieved in pigment-based ink-jet ink compositions by formulating the ink compositions to include at least one appropriately modified pigment in a water-insoluble organic compound, which is microemulsified with an amphiphile and water. By employing a vehicle formulated in accordance with the invention, the present pigment-based ink-jet ink compositions are bleed-free and fast-drying and exhibit the inherent waterfastness of pigments. Moreover, the use of a modified pigment improves print quality by passivating the pigment particles to eliminate agglomerations between the particles and by providing pigment particles of substantially uniform size, thereby yielding more uniform thickness and coverage on a print medium. In short, pigment-based ink-jet ink compositions formulated in accordance with the invention offer the best qualities of pigments as colorants while reducing or eliminating the problems conventionally associated therewith.

REFERENCES:
patent: 5106416 (1992-04-01), Moffatt
patent: 5116409 (1992-05-01), Moffatt
patent: 5133803 (1992-07-01), Moffatt
patent: 5181045 (1993-01-01), Shields et al.
patent: 5198023 (1993-03-01), Stoffel
patent: 5226957 (1993-07-01), Wickramanayake et al.
R. Lustenader, "Color Pigment Encapsulation", Ink World, pp. 74-75 (Jan./Feb. 1995).

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