Method of minimizing absorption of visible light in ink compositions comprising infrared metal-dithiolene dyes
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United States of America Patent
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Dec 16, 2008
Grant Date -
Oct 7, 2004
app pub date -
Apr 2, 2004
filing date -
Apr 7, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of minimizing absorption of visible light in an ink composition. The ink composition includes an IR-absorbing metal-dithiolene dye. The method includes preselecting the dye such that it includes a moiety for reducing intermolecular interactions between adjacent dye molecules. The method is suitable for use in connection with page-based interactive systems employing invisible inks.
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