| 简介 |
The invention relates to the field of the protection of securities from counterfeit and is intended for determining, using equipment, the authenticity of printed articles being protected such as all types of securities. A security has a marking which comprises at least one inorganic compound with a crystalline structure, which inorganic compound is alloyed with ions of rare earth elements and has the property of selective reaction with radiation in the optical spectral range, wherein in the event that said inorganic compound is exposed to radiation in a set band of the optical spectrum, the radiation of the compound only in this band of the spectrum has an excess above thermal radiation with a finite length of 10-10 seconds or more. The proposed invention makes it possible to increase the degree of protection of a security. |
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