SECURITY ELEMENT WITH ACHROMATIC FEATURES
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United States of America Patent
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Issued Date -
Jul 18, 2013
app pub date -
Oct 5, 2011
filing date -
Oct 13, 2010
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Abstract
The invention relates to an achromatic security element for value documents, such as banknotes, cards, ID documents and the like comprising a thermoplastic or a radiation-curable polymer layer, characterised in that the layer is embossed with diffusely reflecting microstructures having sizes in the order of 1-100 μm, a method for producing such security elements, value documents comprising said security elements and a currency system comprising said security elements.
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