ID CARDS WITH BLOCKED LASER ENGRAVING WRITABILITY

摘要

Laser-engraving labeled layer structure comprises at least one thermoplastic synthetic material layer labeled by laser engraving and a surface layer partially- or completely reflecting or absorbing infrared radiation. Independent claims are also included for: (1) a security document, preferably an identification document comprising the laser-engraving labeled layer structure; and (2) a procedure for blocking the writeability by means of laser engraving on the laser-engraving labeled layer structure, comprising providing the thermoplastic synthetic material layer labeled by laser engraving and a surface layer partially- or completely reflecting or absorbing infrared radiation.