Sikkerhedsdokument med et perforeringsmønster

摘要

The invention relates to a forge-proof document (1) comprising a security feature in the form of a perforation pattern (2) which displays grey tones when viewed against a bright background, wherein the document (1) is manufactured from a material which transmits light to a limited extent, at least some of the perforations (2) forming part of the perforation (2) pattern extend over only a part of the thickness of the document (1) at the position of the perforation (2), and the thickness of the remaining part of the document (1) at the position of the perforation (2) is modulated in accordance with the image to be displayed. The invention also relates to such a document (1) comprising a security feature in the form of a perforation (2) pattern which displays grey tones when viewed against a bright background, wherein at least some of the perforations (2) forming part of the perforation pattern extend at an angle differing from 90 DEG relative to the main plane of the document.