Solid phase change fluorescent ink and ink sets

Details Solid phase change fluorescent ink and ink sets Solid phase change fluorescent ink and ink sets

2008-09-19

2010-12-28

Mayes, Melvin C (Department: 1793)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031640, C106S031620

Reexamination Certificate

active

07857900

ABSTRACT:
An ink set includes a plurality of inks, at least one ink but less than all inks of the ink set including an ink vehicle, colorant and fluorescence agent and remaining additional inks including an ink vehicle, colorant and free of fluorescence agent. At least a first ink grouping and a second ink grouping of the ink set form a combination, the first and second groupings of the combination exhibiting a substantially same color under ambient light conditions upon image formation. The first ink grouping and the second ink grouping of the combination contain a different amount of the fluorescence agent, wherein upon exposure to activating energy, the fluorescence agent fluoresces to cause a visible change in the color of a pattern formed in an image by the first ink grouping as compared to the second ink grouping.

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