MULTILAYER PRODUCT CONTAINING PROTECTIVE ELEMENT, AND METHOD FOR ITS PRODUCTION Russian patent published in 2023 - IPC G03H1/18 B42D25/328 B42D25/373 C23C14/35 C23C14/20 

FIELD: security technologies.

SUBSTANCE: method is proposed for producing a reflective layer for protection of valuable documents against forgery, a reflective layer for protection of valuable documents against forgery, a diffractive protective element in the form of a film with a reflective layer, and a multilayer product with an identifying optically variable image, which is a valuable document. Preliminarily, a holographic grating is applied to the polymer substrate in the form of a rolled polymer material to form a lacquer layer with an embossed grating and a layer containing valuable information. Vacuum deposition of a mixture of indium and tin at a mass ratio of indium to tin from 10:90 to 2:98 is carried out by the magnetron method. The said deposition is carried out in an argon atmosphere at an operating pressure of 10^-3 -10^-4 mmHg on a rolled polymeric material moving by reeling, located on a shaft cooled to a temperature of -15 to +15°C. After the said deposition, oxidation is carried out in the air.

EFFECT: simplification of the technology for obtaining a reflective layer of a security element of valuable documents.

12 cl, 1 dwg, 3 ex