Abstract: A security element includes a transparent film, a first layer and a second layer. The first layer includes a first metal arranged on the transparent film in a first pattern. The second layer includes a second metal being a baser metal than the first metal arranged over the first layer in a second pattern. Each of the first and second patterns is composed of metallic regions and metal-free regions. The metal-free regions of the second pattern overlap with the metal-free regions of the first pattern. The metallic regions of the first pattern overlap with the metal-free regions of the second pattern.

Abstract: A method for manufacturing watermarked paper, comprising at least one watermark constituted by one or more light regions which have a lower density of fibers and one or more dark regions which have a higher density of fibers, by way of at least one mould cylinder covered with a mould cover which is adapted to modulate the density of fibers that are deposited on the mould cylinder, which comprises: a step of forming the mould cover, in which one or more light areas adapted to produce the light regions in the paper and one or more dark areas adapted to produce the dark regions in the paper are produced in the mould cover; a step of deposition, in which the fibers are deposited on the mould cylinder covered with the mould cover so as to provide the watermarked paper.

Abstract: A method for manufacturing a security element includes forming a first layer from a transparent material, forming a first holographic surface structure on the first layer, metallizing the first layer to form a first metal layer, forming a second layer from a radiation-sensitive polymer, forming a second holographic surface structure on the second layer, metallizing the second layer to form the second metal layer, forming a pattern of a coating on the second metal layer in which the pattern includes regions covered by the coating and regions uncovered by the coating, removal of the metal in regions of the second metal layer which are uncovered by the coating through de-metallization, exposing the de-metallized regions of the second layer to light or radiation, and removal of the metal in regions of the first metal layer that are not covered by the second layer, through de-metallization.

Abstract: A security element includes comprises a transparent film, a first layer and a second layer. The first layer includes a first metal arranged on the transparent film in a first pattern. The second layer includes a second metal being a baser metal than the first metal arranged over the first layer in a second pattern. Each of the first and second patterns is composed of metallic regions and metal-free regions. The metal-free regions of the second pattern overlap with the metal-free regions of the first pattern. The metallic regions of the first pattern overlap with the metal-free regions of the second pattern.

Abstract: A security element has a transparent film, a pattern of transparent and non-transparent regions on a first side of the transparent film, and a pattern of transparent and non-transparent regions on a second side of the transparent film. The pattern on the second side of the transparent film matches or is in register with the pattern on the first side of the transparent film. A color changing layer covers the pattern on at least one side of the first and second sides of the transparent film.

Abstract: A security element is described includes a transparent first layer having a holographic surface structure, a first metal layer arranged on the first layer in a first pattern having transparent and non-transparent regions and a holographic surface structure, a second layer having a second holographic surface structure, and a second metal layer arranged on the second layer in a second pattern having transparent and non-transparent regions and a holographic surface structure. The, transparent regions of the first metal layer and the second metal layer are arranged to at least partly overlap each other and the non-transparent regions of the metal layers develop holographic effects on both sides of the security element which effects may be different. A process is described for making the security element, wherein an embossable radiation-sensitive polymer material is used to form the second layer.

Abstract: A security element has a transparent film, a pattern of transparent and non-transparent regions on a first side of the transparent film, and a pattern of transparent and non-transparent regions on a second side of the transparent film. The pattern on the second side of the transparent film matches or is in register with the pattern on the first side of the transparent film. A colour changing layer covers the pattern on at least one side of the first and second sides of the transparent film.