Value document comprising a machine-readable authenticity mark
First Claim
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1. A value document having a machine-readable authenticity mark, characterized in that the authenticity mark comprises a luminescent marking substance emitting in the infrared spectral range, and a marking substance absorbing in the infrared spectral range.
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Abstract
The invention relates to a value document having a machine-readable authenticity mark. According to the invention the authenticity mark comprises a luminescent marking substance and a marking substance absorbing in the infrared spectral range.
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Citations
57 Claims
- 1. A value document having a machine-readable authenticity mark, characterized in that the authenticity mark comprises a luminescent marking substance emitting in the infrared spectral range, and a marking substance absorbing in the infrared spectral range.
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44. (canceled)
Specification