VERIFIABLE HOLOGRAPHIC ARTICLE

摘要

A verifiable holographic article (1) comprises a substrate (5) comprising at least one hologram (10); and at least one covert image that is convertible t o an overt image using a decoding sampling device, e.g., a photocopier, that produces an aliasing or moire effect. The article cost-effectively provides both "first line" and "second line" security features and can be easily, quickly, and safely verified or authenticated.