Ink composition comprising optically variable pigments, use of the composition, optically variable pigment and method of treating said pigment
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United States of America Patent
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Jun 3, 2008
Grant Date -
Dec 9, 2004
app pub date -
Aug 15, 2002
filing date -
Aug 28, 2001
priority date (Note) -
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Abstract
The invention relates to passivated optically variable pigment, a method of preparing said passivated optically variable pigment, an ink composition comprising said passivated optically variable pigment, the use of said ink composition, and a document carrying a marking made with said ink composition.
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