The security document or device having a contrast effect in low relief

摘要

Invention Patent: B "SAFETY DOCUMENT OR PROVISION HAVING A CONTRACT EFFECT ON RELEVED BACKGROUND" D . The invention refers to a safety document or device with a substrate (2),a highly reflective smooth layer (1) applied to the substrate (2) and having a reflectability of at least 60 units of brightness, a high printed image (3) of lines or points applied to the said reflecting layer (1) by a printing process and having a height of approximately 10 to 100 109 m, and typically about 30 109 m, and a similar spacing being adjacent rows or points, the saturation value of the ink hue used to print the image being between 30 and approximately 50 saturation units tending to a saturation value of 60 saturation units, the brightness of the ink being at least 50 L degrees (units of luminosity),and typically between 70 and 100 L degrees.