Patent ID: 8403368
Filing Date: 2013-03-26
Classification: B42D,D21H

Abstract:
1. A security document comprising a translucent carrier substrate of paper and/or plastic material, and at least one security element which is applied to the carrier substrate or embedded in the carrier substrate and which presents at least one image when viewed in a transillumination mode from at least a first side of the security document and simulates a presence of at least a first watermark in the carrier substrate, wherein the security element has at least region-wise at least one layer which simulates the at least one first watermark and which locally alters the visually perceptible translucence of the carrier substrate, and wherein the at least one security element applied to the carrier substrate or embedded in the carrier substrate visually perceptibly in the transillumination mode shows a third image different from the first image viewed from a second side opposite to the first side, wherein the security document is so adapted that between the at least one layer simulating the at least one first watermark and the first side and between the at least one layer simulating the at least one first watermark and the second side the light passing therethrough is scattered to differing degrees such that the third image comprises the first image plus regions of high translucency, said regions of high translucency not being visible when the first image is visible when viewing the security document in the transillumination mode from the first side of the security document.