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Solid phase change fluorescent ink, ink set and method of forming an image

A technology of solid-state phase change and ink set, which is applied in the direction of ink, printing of special varieties of printed matter, printing process, etc., and can solve problems such as application limitations and inherent spectral characteristics limitations of fluorescent marks

Inactive Publication Date: 2015-08-05
XEROX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, fluorescent labels rely on fluorescence on the substrate to achieve the effect and thus may be limited in application
Fluorescent markers, for example, are limited by the inherent spectral properties of the pigment and are usually only available in light colors

Method used

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  • Solid phase change fluorescent ink, ink set and method of forming an image
  • Solid phase change fluorescent ink, ink set and method of forming an image
  • Solid phase change fluorescent ink, ink set and method of forming an image

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] A black ink was prepared by melting and mixing about 2% of a fluorescent dye (DFKY-CY from Risk Reactor) in a black solid ink composition. The black solid ink composition contained 2.8% carbon black pigment in a solid ink base similar to that currently available on the Xerox Phaser 8860.

[0107] A similar black ink was prepared; it had the same effective percentage of carbon black as the ink above, except that it did not contain the fluorescent dye.

[0108] Text was written on a paper substrate using both inks containing the fluorescent dye and inks not containing the fluorescent dye. Under ambient light conditions, the two writings displayed essentially the same black color with no discernible difference. However, when exposed to black light (ultraviolet light), the color of the text written with the fluorescent ink changed from black to red.

Embodiment 2

[0110] This embodiment also uses the above inks. A large black rectangle is first printed with ink that does not contain the fluorescent dye. The text "security message" was then printed on the black rectangle with ink containing the fluorescent dye. Only a black rectangle is visible in ambient light. Upon exposure to a black light, the words "security message" were displayed in red within the black rectangle, where the ink containing the fluorescent dye was printed.

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Abstract

Provided is an ink set comprised of a plurality of solid phase change inks, at least one ink but less than all inks of the ink set comprising an ink vehicle, pigment and fluorescence agent and remaining additional inks comprised of an ink vehicle, pigment and free of fluorescence agent, wherein 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 containing 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.

Description

technical field [0001] The present invention relates to a solid phase change or hot melt ink set comprising multiple inks, wherein at least one ink of the ink set contains a fluorescer. The ink set includes a combination of a plurality of ink groupings, including a first grouping and a second grouping that exhibit substantially the same color under ambient light conditions, and wherein one ink grouping is greater than another ink grouping of the combination Packets contain more fluorescent agents. The fluorescer fluoresces upon exposure to activation energy such that there is a visible change between the appearance of the two ink packets. The combination of specific pigment colorants and fluorescers enables the fluorescer-containing ink to be conveniently a dark ink, such as a black ink. [0002] The various embodiments described herein have various advantages. For example, inks containing fluorescent agents may be used to include security features in printed documents, inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/40C09D11/50B41M3/14
CPCC09D11/34B41M3/144C09D11/324C09D11/50C09D11/54
Inventor P·M·卡兹梅尔G·艾弗泰姆C·A·瓦格纳王申格R·埃斯科巴赫
Owner XEROX CORP