Combined multi-spectral document markings

Details Combined multi-spectral document markings Combined multi-spectral document markings

B - Operations, Transporting

07

C

B07C 3/18 (2006.01) B41F 17/00 (2006.01) B42D 15/00 (2006.01) G06K 7/10 (2006.01) G07B 17/00 (2006.01) B44F 1/08 (2006.01)

Patent

CA 2568696

A document printed marking including a first information marking including first luminescent taggants having a first luminescence wavelength band; and a second information marking printed at least partially on the first information marking at an overlap location. The second information marking includes second different luminescent taggant having a second different luminescence wavelength band. The second luminescence wavelength band is spaced from the first luminescence wavelength band such that the first information marking and the second information marking are substantially luminescently non-intrusive with each other at the overlap location.

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