TAMPER EVIDENT SECURITY FILM

摘要

A security film (10) adapted to display a message indicative of tampering is disclosed. A light transmitting sheet (16) has a first layer on one surface (22), a release layer on a portion of the opposite surface (24), and a second layer covering the release layer and another portion of the opposite surface (26). The first layer is a metal and the second layer is a metal or a non-metal. An adhesive layer (14) on the second surface adheres the film to a substrate (12). Removal of the sheet from the substrate causes the sheet to separate from the second layer under the release layer making a release layer pattern visible on both the sheet and substrate as reverse images. A method disclosed includes metalizing a light transmitting sheet with a metal layer on one side and a release layer and a metal or a non-metal layer on the opposite side.