METHOD FOR COUNTERFEIT PROTECTION AND AUTHENTICATION OF ARTICLES MADE OF PRECIOUS METALS Russian patent published in 2015 - IPC G07D7/00 

FIELD: physics, signalling.

SUBSTANCE: invention relates to methods of protecting valuable articles from counterfeit and subsequent authentication thereof using technical equipment. The method comprises forming a security means with addition of chemical elements to enable inspection by X-ray fluorescence analysis. The security means used is a ceramic paint to which a chemical element in the form of a lanthanide is added in amount of 1.0-10.0%, followed by drying and firing the article at 700-800°C, and presence and authenticity of the security means on the article is checked from the presence of analytical lines of lanthanide atoms in the X-ray fluorescence spectrum or by comparing the X-ray fluorescence spectra of the security means simultaneously deposited on the article and on a metal plate, which is the chemical passport of the article, and specifically from the identity thereof at the wavelength of said lanthanide.

EFFECT: high reliability of counterfeit and imitation protection of valuable articles made of precious metals.

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