| 摘要 |
The security element (2) for the security document (1) is made at least partially of a material (M) which can be optically altered by application of an electrical or magnetic field, e.g. by alignment of particles (8) contained within a binder (6) via the applied field. The security element may contain information which is altered optically by application of the electrical or magnetic field, e.g. for rendering the information visible or invisible. Also included are Independent claims for the following; (a) a method for manufacture of a security document; (b) a testing method for checking a security document. |
