Securing the authenticity of value documents by means of characteristic substances
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United States of America Patent
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Nov 17, 2020
Grant Date -
Feb 9, 2017
app pub date -
Oct 19, 2016
filing date -
Oct 5, 2005
priority date (Note) -
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Abstract
A feature substance is provided for securing the authenticity of documents of value, having at least one luminescent substance in particle form and nanoparticles enveloping the surfaces of the luminescent substance particles at least partially, wherein the properties of the feature substance result from the interaction of the properties of the luminescent substance and of the nanoparticles. The invention furthermore relates to a method for producing the feature substance, a method for securing the authenticity of a security element or document of value using a feature substance, as well as security elements and documents of value with authenticity features on the basis of the feature substance.
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