Continually variable demetallization of metallized films and similar objects
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United States of America Patent
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Apr 28, 2009
Grant Date -
Jun 1, 2006
app pub date -
Nov 3, 2005
filing date -
Nov 3, 2004
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Abstract
A method of generating a variable demetallized pattern in a holographic web and a security device using such method. A holographic microstructure pattern is imparted to an oligomer disposed on a surface of a substrate. A metal layer, such as aluminum, is deposited to the holographic microstructure pattern of the substrate and then covered with a variable resist pattern. The variable demetallized pattern in the holographic web is then generated by removing the metal layer not covered by said variable resist pattern.
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