| 摘要 |
In a method for manufacturing a multi-layer identity, credit or cheque card, an inner layer of the card covered by a transparent protective film is, by means of a laser beam, inscribed with card-specific data relating to the identity of the authorized user, use being made of an inner layer with heat-sensitive colouring materials which undergo a colour change under the action of the laser beam. In order for it to be possible to include individual features, in particular personalizing data, in a forgery-proof form which is difficult to imitate, the heat-sensitive materials are provided in the form of a pattern, and the information is illustrated by the local changes in colour which occur when the laser beam passes over the pattern. <IMAGE> |
