摘要:
An optically variable magnetic stripe assembly comprises a magnetic layer (5); an optically variable effect generating layer (1) over the magnetic layer; and a metallic reflecting layer (3) adjacent the optically variable effect generating layer and comprising an array of spaced metallic regions shaped as regular polygons.
摘要:
A security article includes a security device comprising an opaque scratch removable layer (7) on and/or in which is provided a diffractive, optically variable effect generating structure (4). The scratch removable layer (7) overlies covert information (12) on the article. The security device exhibits first indicia which relate to second indicia elsewhere on the article.