Fluorescent hidden indicium

Details Fluorescent hidden indicium Fluorescent hidden indicium

G - Physics

06

K

G06K 19/06 (2006.01)

Patent

CA 2543387

A printed indicium including a first section and a second section is described. The first section includes a first ink having a first color under normal daylight. The second section includes a second different ink. The second ink includes a fluorescent ink which has a second color under normal daylight which is substantially the same as the first color. The fluorescent ink has a fluorescence when subjected to fluorescent-exciting radiation. The second section is imbedded with the first section such that the first and second sections are substantially visually indiscernible from each other in normal daylight.

L'invention concerne un indice caché, comprenant une première section et une seconde section. La première section comprend une première encre, d'une première couleur en lumière du jour normale. La seconde section comprend une seconde encre différente de la première. La seconde encre comprend une encre fluorescente présentant une seconde couleur en lumière du jour normale, qui est sensiblement la même que la première couleur. L'encre fluorescente présente une fluorescence lorsqu'elle est exposée à des rayonnements stimulant la fluorescence. La seconde section est intégrée à la première section, de sorte que la première et la seconde section soient sensiblement indiscernables l'une de l'autre en lumière du jour normale.

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