公开(公告)号：WO2022002366A1

公开(公告)日：2022-01-06

申请号：PCT/EP2020/068383

申请日：2020-06-30

申请人： FASE S.R.L.

发明人： AUDINO, Orazio ,  BERARDI, Francesco ,  BUSSAGLIA, Cristian ,  CAMMISA, Geremino ,  CIMATTI, Luca

IPC分类号： B42D25/328 ,  B42D25/351 ,  B42D25/36 ,  B42D25/373 ,  B42D25/387 ,  B42D25/445 ,  B42D25/455 ,  B42D25/47 ,  B42D25/364

摘要： A security element comprises a first transparent film, on which a holographic layer is formed having a holographic surface structure, a reflective layer arranged in contact with the holographic layer having a pattern of non - transparent regions and transparent regions, a color changing layer, and a photoactive layer having dark regions and transparent regions. In first regions, parts of the non-transparent regions of the reflective layer are not overlapped by the dark regions of the photoactive layer. In second regions, the color changing layer is backed by the dark regions of the photoactive layer. In third regions, the transparent regions of the photoactive layer are at least partly in register with the transparent regions of the reflective layer so that the third regions are continuous when passing from patterns outside the non-transparent regions of the reflective layer to patterns outside the dark regions of the photoactive layer. With this arrangement, when viewed in reflected light, a holographic effect is visible in the first regions and simultaneously a color change effect is clearly visible in the second regions. Furthermore, when viewed in transmitted light, a transparency effect is visible in the third regions. Accordingly, a multifunction security element is provided, in which security is improved by combining multiple effects in visual inspection.