The present invention provides a method of minimizing absorption of visible light in an ink composition comprising an IR-absorbing metal cyanine dye, said method comprising preselecting said dye such that said metal has at least one axial ligand bound thereto, wherein said axial ligand comprises a moiety suitable for reducing intermolecular interactions between adjacent dye molecules. The method is especially suitable for use in connection with netpage and Hyperlabel systems.

 
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