Patent ID: 7175206

Claim:
An anti-counterfeiting marker for producing variable entries ( 19 ) and affixing same to a support ( 18 ) to be marked, while preventing their falsification, comprising: a core ( 1 ) in the form of a sheet having at least one coloured effect, called the first coloured effect ( 21 ) which is visible on at least one side, called the front side ( 2 ), at least when illuminated by predetermined light, and is adapted to be non-removable by scratching or erasing on the front side of the core ( 1 ) without causing visible and irreversible damage to the core ( 1 ), a thickness, called the brittle thickness ( 3 ), covering at least a part of the core ( 1 ) on the front side, said brittle thickness ( 3 ): presenting a free surface, called the printing surface ( 4 ), suitable and designed to receive variable entries ( 19 ), said brittle thickness ( 3 ) being adapted to allow such variable entries ( 19 ) to be produced on the printing surface ( 4 ) without being damaged or becoming detached from the core ( 1 ); being adapted to be damaged and to become detached from the core ( 1 ) under the effect of scratching or erasing intended to falsify the variable entries ( 19 ); including, at least opposite at least one subjacent first coloured effect ( 21 ), at least one coloured effect, called the second coloured effect ( 22 ), which is visible on the printing surface ( 4 ) at least when illuminated by said predetermined light and is adapted to produce a third coloured effect ( 23 ) distinct from the first ( 21 ) and second ( 22 ) coloured effects by combining with the first coloured effect ( 21 ), and being at least partially transparent, at least when illuminated by said predetermined light, to at least each component of said predetermined light which enables the production of each first coloured effect ( 21 ) and of each second coloured effect ( 22 ) produced below the printing surface ( 4 ), and to radiation emitted by said coloured effects ( 21 , 22 ), in order to enable each third coloured effect ( 23 ) to be displayed.