Preparation, consisting of a film, foil-like or wafer-like administration form with a two-layer structure and integrated marking

The invention relates to a film, sheet or wafer-shaped preparation for administering substances with a taste or smell-related and/or caring and/or healing effect, in which these substances are identified by a code in the form of written or graphic markings or patterns. Said code is configured in the form of surface areas of different thickness. The invention is characterised in that the preparation comprises two differently coloured adjacent layers with complementary surface areas of different thickness.