Security document with a volume hologram forming a partial...

B - Operations – Transporting – 42 – D

Patent

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B42D 15/10 (2006.01) B42D 15/00 (2006.01)

Patent

CA 2578012

A security object has a substrate (1) carrying a first motif (6) and mutually aligned thereto a second motif (7). The first motif (6) is formed by a volume hologram (8) and visible under a given viewing condition only. The second motif (7) can e.g. be a dye, a surface hologram, a perforation or any other non-variable or optically variable device. The first and the second motif (6, 7) combine to form a third motif, e.g. a legible text. The combination of the first motif (6) formed by a volume hologram (8) with the second motif provides an increased level of security.

L'invention concerne un objet de sécurité comprenant un substrat (1) comportant un premier motif (6) et un deuxième motif (7) alignés entre eux. Le premier motif (6) est formé par un hologramme épais (8) et il est visible uniquement dans une certaine condition de visualisation. Le deuxième motif (7) peut être par exemple un colorant, un hologramme de surface, une perforation ou tout autre dispositif non variable ou optiquement variable. Ces premier et deuxième motifs (6, 7) se combinent pour former un troisième motif, tel qu'un texte lisible. La combinaison du premier motif (6) formé par un hologramme épais (8) et du deuxième motif permet d'obtenir un niveau de sécurité accru.

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