METHOD FOR PERMANENTLY TRANSFERRING A DIFFRACTION NETWORK, TRANSFER FILM AND DEVICE FOR CARRYING OUT SAID METHOD

摘要

Distinct element for authenticating a personal document such as a card and preventing forgery thereof. The element comprises a transfer film (1) composed of a base film carrying at least one layer formed by a protection varnish, a partially metallized or transparent reflection layer comprising the stamped optical image, and an adhesive layer which can be activated. The invention is characterized in that the transfer film (1) is linked to a base sheet by a joining area (3).