SECURITY INK AND SECURITY ARTICLE, SUCH AS A BANKNOTE, WITH A TRI-LUMINESCENT EFFECT
A security ink contains at least a first fluorescent and phosphorescent pigment and a second fluorescent pigment, wherein the security ink if excited with a first wavelength emits radiation with a first emission spectrum, if excited with a second wavelength emits radiation with a second emission spe...
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Sprache: | eng ; fre |
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