A sheet-like, film-like or wafer-like preparation for administering substances
affecting flavor or odor and/or substances for care and/or curative substances,
comprising a coding of these substances in the form of characters and/or graphic
symbols or patterns, with the coding being formed by surface areas of differing
thickness, is characterized in that the preparation comprises two differently colored,
adjacent layers which have surface areas of differing thickness which are complementary
to each other.