Security substrate comprising a magnetic layer and opaque and non-opaque regions
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United States of America Patent
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Nov 1, 2016
Grant Date -
Dec 18, 2008
app pub date -
Aug 18, 2008
filing date -
Apr 25, 2002
priority date (Note) -
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Abstract
The invention relates to improvements in substrates and in particular to new substrates having magnetic and visual security features, which provide security against imitation. A security substrate comprising a transparent polymer carrier layer bearing indicia formed from a plurality of opaque and non-opaque regions and a transparent magnetic layer supported by the carrier layer containing a distribution of particles of a hard magnetic material of a size and distributed in a concentration at which the magnetic layer remains transparent.
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