DEVICES AND METHODS FOR PRODUCING LAYERS WITH AN OPTICAL EFFECT, CONTAINING ORIENTED NON-SPHERICAL MAGNETIC OR MAGNETIZABLE PARTICLES OF A PIGMENT Russian patent published in 2020 - IPC B41M3/14 B42D25/364 B42D25/369 B42D25/378 B05D5/06 

FIELD: document security.

SUBSTANCE: invention relates to protection of valuable documents and valuable commercial products from counterfeiting and illicit reproduction, specifically to a device and a method of producing layers with optical effect (OEL), magnetic assemblies and methods of producing said OEL, as well as to applications of said OEL as counterfeit means on documents. Layers with optical effect contain oriented non-spherical magnetic or magnetized non-spherical magnetic or magnetizable pigment particles, which demonstrate the optical effect depending on the viewing angle.

EFFECT: invention provides creation of protective features displaying attracting attention dynamic loop-like effect on substrate of good quality, in which said protective features can be easily checked, but difficult to reproduce during mass production using equipment available for counterfeiting, and which can be provided in a large number of different forms and types.

15 cl, 14 dwg, 1 tbl, 14 ex