PAPER-BASED OR POLYMER-BASED MULTI-LAYER DOCUMENT AND METHOD FOR DETERMINING AUTHENTICITY THEREOF

摘要

The invention relates to the field of preparing materials intended for visually determining the authenticity of protected printed products such as all types of valuable documents. Set forth is a multi-layer material on a paper or polymer substrate, said material containing layers having optically-variable properties. Optically-variable layers which are indistinguishable to the naked eye and which have mutually opposite directions of circular polarization are in the form of two identical images of a single graphical element, said layers being shifted in the same plane by a given distance which allows for seeing a stereoscopic image of the graphical element when using eyeglasses having polarizing light filters having a mutually opposite direction of circular polarization. The technical result is an increased level of protection by means of a simple method for determining the authenticity of a product.