Data support card for use e.g. identification card, has protection layers with sides adhered to sides of core layer, where one of layers has zone, which is sensible to exposition at external environmental factor to form tamper indicator

摘要

The card has two transparent protection layers (5, 6) with contact sides (7, 8) that are adhered to contact sides (2, 3) of a core layer (1). One of the layers has a zone, which emerges on the corresponding side and is sensible to the exposition at the external environmental factor to form a tamper indicator. The layers incorporate an additive i.e. free radical promoter, allowing the deterioration of parts of the layers when the additive is exposed to the external environmental factor.