| 摘要 |
PCT No. PCT/GB96/00436 Sec. 371 Date Aug. 7, 1997 Sec. 102(e) Date Aug. 7, 1997 PCT Filed Feb. 27, 1996 PCT Pub. No. WO96/27178 PCT Pub. Date Sep. 6, 1996A tamper indicating security item such as a shrink wrap seal comprises a substrate including an optically variable effect generating structure such as an embossed hologram. Each surface of the substrate carries an adhesive having a strength such that after the substrate has been adhered to a surface it cannot be removed without damaging the optically variable effect generating structure. |
