Method of minimizing absorption of visible light in ink compositions comprising infrared metal-dithiolene dyes
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1. A method of minimizing absorption of visible light in an ink composition comprising an IR-absorbing metal-dithiolene dye, wherein the dye is preselected from a metal-dithiolene of formula (II):
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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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8 Claims
- 1. A method of minimizing absorption of visible light in an ink composition comprising an IR-absorbing metal-dithiolene dye, wherein the dye is preselected from a metal-dithiolene of formula (II):
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