METHOD OF PRODUCING PROTECTIVE LABEL SUBSTANCE CONTAINING DIAMOND MICROCRYSTALS WITH ACTIVE NV-CENTRES, HAVING RADIATION-MODIFIED PROPERTIES, METHOD FOR PROTECTION FROM COUNTERFEITING AND AUTHENTICATION OF ARTICLES USING SAID LABEL Russian patent published in 2015 - IPC B41M5/00 

FIELD: chemistry.

SUBSTANCE: method of producing at least two types of an active substance of a label for counterfeit-protection of articles, containing diamond microcrystals with active NV centres, distinguishable by the form of optical-radio-frequency double resonance, the method comprising: recording the relationship between the form of optical-radio-frequency double resonance of diamonds, which are irradiated with a beam of high-energy particles, sufficient for creating vacancies in the diamond lattice, with fluence value from 10¹⁶ cm^-2 to 10²⁰ cm^-2 and annealed, and said fluence value; dividing said relationship into at least two non-crossing ranges corresponding to said types; for each of said types, irradiating the initial diamonds with said beam of high-energy particles with a fluence which falls in the corresponding range, firing and crushing into a powder.

EFFECT: wider range of use with simultaneous improvement of the degree of counterfeit protection.

3 cl, 3 dwg