Fluorescent water base ink for ink-jet recording

Details Fluorescent water base ink for ink-jet recording Fluorescent water base ink for ink-jet recording

2008-04-29

2008-04-29

Lorengo, J. A. (Department: 1793)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031150

Reexamination Certificate

active

11080476

ABSTRACT:
A fluorescent water base ink for ink-jet recording includes water, a first fluorescent dye, and a second fluorescent dye. The first fluorescent dye absorbs light in a first absorption wavelength region in an ultraviolet region to emit fluorescence, and the first fluorescent dye absorbs light in a second absorption wavelength region to emit no fluorescence. The second fluorescent dye absorbs light in an absorption wavelength region in the ultraviolet region, which is different from the first absorption wavelength region of the first fluorescent dye, to emit fluorescence. A wavelength region of the fluorescence of the second fluorescent dye is not overlapped with the first absorption wavelength region of the first fluorescent dye, but at least a part of the wavelength region of the fluorescence of the second fluorescent dye is overlapped with the second absorption wavelength region. The fluorescence intensity of the ink is increased.

REFERENCES:
patent: 5988807 (1999-11-01), Bernard et al.
patent: 6284027 (2001-09-01), Auslander et al.
patent: A 11-80632 (1999-03-01), None
patent: A 11-209675 (1999-08-01), None
patent: A 2003-192962 (2003-07-01), None

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