Security document or device having an intaglio contrast effect

Details Security document or device having an intaglio contrast effect Security document or device having an intaglio contrast effect

B - Operations, Transporting

42

D

B42D 15/00 (2006.01) B41M 3/14 (2006.01) B42D 15/10 (2006.01) B44F 1/12 (2006.01)

Patent

CA 2350330

A security document or device having a substrate (2), a smooth highly reflective layer (1) applied to the substrate (2) and having a reflectivity of at least 60 gloss units, a raised printed image (3) of lines or dots applied to said reflective layer (1) by a printing process and having a height of about 10 to 100 µµm, and typically about 30 µµm, and a similar spacing being adjacent lines or dots, the hue chroma value of the ink used to print the image being between 30 and about 50 chroma units tending towards a saturation value of 60 chroma units, the lightness of the ink being at least 50 L degrees (lightness units), and typically between 70 and 100 L degrees.

L'invention concerne un document ou dispositif de sécurité dotée d'un substrat (2), d'une couche lisse hautement réfléchissante (1) appliquée sur le substrat (2) et présentant une réflectivité d'au moins 60 unités de brillance, d'une image imprimée en relief (3) formée de lignes ou de points appliquée à ladite couche réfléchissante (1) au moyen d'un procédé d'impression et dont la hauteur est comprise entre environ 10 et 100 mu m et généralement environ 30 mu m, enfin d'un espace similaire entre les lignes ou les points. La tonalité de l'encre utilisée pour imprimer l'image est comprise entre environ 30 et environ 50 unités de chrominance, avec une tendance vers une valeur de saturation de 60 unités de chrominance ; la clarté de l'encre s'élève à au moins 50 L (unités de clarté), et est généralement comprise entre 70 et 100 L.

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