Paired optically variable security element
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United States of America Patent
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Apr 7, 2015
Grant Date -
Sep 8, 2011
app pub date -
Sep 16, 2009
filing date -
Oct 3, 2008
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Abstract
Paired optically variable security element which includes first and second optically variable thin-film multilayer interference devices in the form of optically variable foils or of printings made with inks having optically variable interference pigments. The first and second interference devices exhibit spectral matching at a determined angle of incidence. Sets of optically variable devices and of coating compositions include optically variable pigments for the production of the paired optically variable security element. Moreover, the security element can be used for the protection of documents and goods, and security documents and goods.
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