Patent ID: 7703809

Claim:
A printed product comprising a carrier of a main image applied thereon transmitted by an ordered screen having a specified angle and lineature and at least one additional latent image which is hidden from visualization and transmitted by a deformed-structure screen, said latent image being identifiable by a test pattern applied on the printed product, wherein the latent image is displayable in preserved tints or contour lines when applied the test pattern comprising a transparent substrate with a linear screen applied thereto, and which angle and lineature are identical to those specified, and wherein the printed product comprises two additional latent images transmitted by a screen having a structure deformed perpendicularly and in parallel to the angle of its construction depending on tone gradation of the corresponding additional image, and wherein the main image is transmitted in printing by two colors with application of linear screens having a 90 degree angle difference of half-tone screening, thus two additional latent images are formed, each image in one of the colors of the main image transmitted by screens of corresponding colors having a structure deformed in function of the given additional images tone gradations.