Printed magnetic ink overt security image
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United States of America Patent
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Sep 27, 2011
Grant Date -
Jul 17, 2008
app pub date -
Oct 30, 2007
filing date -
Sep 13, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A security image and method of forming said image is disclosed wherein a substrate having an image or indicia thereon is coated with a dilute solution of pigment flakes in an ink or paint. The flakes are subsequently aligned in a magnetic field and are fixed after the field is applied. Most or all of the flakes in a region are aligned so as to be partially upstanding wherein their faces are essentially parallel. Coating the image with flakes yields a latent image which can be clearly seen at a small range of predetermined angles.
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