Solid marking composition as writing means, a writing instrument, an optically variable marking layer and use of a plurality of optically variable pigments
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United States of America Patent
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Sep 21, 2004
Grant Date -
Mar 27, 2003
app pub date -
Sep 26, 2002
filing date -
Apr 14, 2000
priority date (Note) -
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Abstract
A solid marking composition comprises a solid matrix containing at least one type of optically variable interference pigment flakes. The solid marking composition provides a document or article with a copy and counterfeit protection feature, and is preferably used in a writing instrument for applying hand-written anti-counterfeit markings and signatures.
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