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US08367188B2 Authenticity mark in the form of luminescent substances 有权
发光物质形式的真实性标记

Authenticity mark in the form of luminescent substances
Abstract:
A printed document of value has an authenticity feature in the form of at least two luminescent substances on the basis of host lattices which are doped with one or a plurality of ions. By systematically changing the host lattices and/or ions of the (nd)3 electron configuration a specific setting of the luminescence properties of luminescent substances is possible, the combination of which permits a multiplicity of complex new authenticity features.
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