Method of authenticating an item
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United States of America Patent
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Oct 20, 2015
Grant Date -
Jan 29, 2015
app pub date -
Jul 24, 2013
filing date -
May 17, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A method of authenticating an item with a security mark includes providing a substrate (100); printing the security mark on the substrate with invisible ultraviolet (UV) absorbing ink (102); applying a coating comprised of UV fluorescent varnish (104) over the security mark and substrate; illuminating an area comprising the security mark and coating with UV light; identifying a reduced fluorescence image of the security mark; comparing the reduced fluorescence image with the security mark; and authenticating the item if the reduced fluorescence image matches the security mark.
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