Coding system for value documents

Compositions – Inorganic luminescent compositions with organic...

Reexamination Certificate

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Details

C252S301160, C252S301330, C252S301340, C252S301350, C283S092000, C428S690000, C106S031640, C106S031150, C106S031320

Reexamination Certificate

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07927511

ABSTRACT:
The invention relates to a composition for coding having at least one pair of mutually associated luminescent substances having first and second luminescent substances which emit in a joint emission range located outside the visible spectral range. The emission spectra of the first and second luminescent substances overlap in at least a subrange of the stated emission range such that the emission spectrum of the first luminescent substance is complemented by the emission spectrum of the second luminescent substance.

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