Method for producing counterfeit-proof confidential and valuable documents
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United States of America Patent
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Sep 11, 2012
Grant Date -
Aug 12, 2010
app pub date -
Oct 23, 2009
filing date -
Apr 25, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A production method is provided by which a copied volume hologram from a multi-layer master is later customized by utilization of the color tuning properties of the light-curable materials used for the application onto personal documents. These holographic individual data, such as a passport photo, are also separately detectable, without the holographic elements copied from the master, that are visible under other viewing angles, impairing the visibility of the individual data. The volume hologram overlay obtained by this method is applied on personal and valuable documents to increase protection against forgery, possesses superimposed optically variable items of information that are separately visible under different viewing angles and give a defined color change under different view angles, wherein at least one of these items of optical information represents individual personal data, in particular a passport photograph.
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