Security devices incorporating colour shifting inks
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United States of America Patent
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Feb 2, 2016
Grant Date -
May 8, 2014
app pub date -
Jun 25, 2012
filing date -
Jun 29, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A security document or device is provided which includes at least one area formed from a transparent plastics material which is exposed on at least one side to form a window or half-window, and a first color shifting ink composition and a second color shifting ink composition which both include different color pigments and interference pigments but which both, at a first viewing angle, exhibit substantially the same color when the interference pigments are viewable, and at other angles exhibit different colors when viewing the color pigments.
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