| 摘要 |
A method of protecting an article (2) from alteration and duplication by the use of a hologram (30, 32) and a write resist top surface includes providing an article (2) having a zone to be protected. Providing a hologram (30, 32) as a transparent overlay using heat activatable thermoplastic adhesive and securing the hologram (30, 32) to the article (2) over the zone by applying heat and pressure to the hologram (30, 32) to activate the adhesive layer as in a normal laminating process. The application of heat and pressure to the zone will simultaneously cure the write resist layer. The article (2) may be a document with a signature (28) underlying the transparent hologram (30, 32). An alteration resistant article (2) has a zone having information to be protected, an overlying transparent hologram (30, 32) secured to the zone by a heat activatable thermoplastic adhesive, a write resist layer secured in an overlying relationship with respect to the hologram (30, 32) with the write resisting layer including a thermally cured silicone. In one embodiment, the thermally cured silicone will contain about 2.5 to 10 weight percent wax. |
