Two-step method of coating an article for security printing by application of electric or magnetic field
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United States of America Patent
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-
Mar 9, 2010
Grant Date -
Aug 31, 2006
app pub date -
May 1, 2006
filing date -
Sep 13, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A two-step method of making of a security printed image is disclosed and includes coating of the surface of a substrate with a predetermined image shape with an ink containing flaked magnetic pigment in a predetermined concentration, exposing a wet printed image to a magnetic field to align magnetic particles in a predetermined manner, allowing the ink to cure, and coating the substrate with a second printed image on the top of the first image. The second printed image with the same or different image shape is printed with another ink containing clear or dyed ink vehicle mixed with flaked magnetic pigment in a low concentration, exposed to the magnetic field of the same or different configuration as the first printed image and cured until the ink is dry.
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