Systems and methods for using microscopic capsules containing orientable materials for document security and processing applications
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United States of America Patent
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Issued Date -
Feb 12, 2009
app pub date -
Jul 21, 2008
filing date -
Jul 20, 2007
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Abandoned
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Abstract
Systems and methods for using microscopic capsules containing orientable materials for document security and processing applications are presented. A security application comprising a medium having a substrate and a plurality of microcapsules is disclosed. The microcapsules contain magnetically orientable material and a liquid. The magnetically orientable material is oriented in a first alignment. Application of a magnetic field to the medium orients the magnetically orientable material to a second alignment, thereby altering the opacity of the medium. Magnetic material may also be dragged into a concentrated arrangement by a magnetic field, thereby altering the opacity of the medium.
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