Optically Variable Security Element Comprising Optically Variable Colour Layer
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United States of America Patent
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Issued Date -
Jul 31, 2014
app pub date -
Mar 1, 2012
filing date -
Apr 1, 2011
priority date (Note) -
Abandoned
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Abstract
An optically variable security element for securing valuable articles has an optically variable color layer. The optically variable color layer includes a plurality of microcapsules, each of which exhibits a capsule shell, a carrier liquid enclosed in the capsule shell, and at least one optically variable and magnetically alignable pigment that is substantially freely rotatable in the microcapsule and reversibly alignable by an external magnetic field, and that is developed to be multilayer having at least one magnetic layer and having at least one non-magnetic layer.
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