Method of preparing an optical security component having a metallic appearance, and component thus produced
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United States of America Patent
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Issued Date -
Nov 16, 2006
app pub date -
Mar 12, 2004
filing date -
Mar 12, 2003
priority date (Note) -
Abandoned
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Abstract
A method of preparing an optical security component having a metallic appearance and having a diffraction grating. The method includes the following steps: preparing a transparent polyester film; depositing a stamping layer, into which the hologram producer has pressed the appropriate microstructures; stamping; vacuum depositing a fine layer of a dielectric material having a high optical index; coating or printing at least one layer of translucent coloured varnish; and vacuum depositing a layer of aluminium. An optical security component thus produced is also disclosed.
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