A method for marking a product (1) with a photoluminescent mark, said mark comprising a photoluminescent portion (10) which is transparent under normal light conditions and revealed by photoluminescence under UV illumination, said mark further comprising a non photoluminescent portion (9) which is transparent under normal light conditions as well as under UV illumination, said method comprising: deposing on said product a stack, said stack comprising alternatively layers (2, 4), such as AlN, with a thickness of less than 1 micron and layers (3) of a second material, such as GaN, with a thickness of less than 10 nm; raising the transparency of said non photoluminescent portion (10) with a deposition of transparent material (6) or incorporation of ions into said non photoluminescent portions.

A display that exhibits improved anti-counterfeiting effects. The display includes an uneven-structure-forming layer having an uneven structure on one surface and a reflecting layer that covers at least part of an unevenly structured surface. In the display, the uneven-structure-forming layer includes a first region group including a plurality of first regions, each first region including a flat part and a plurality of convexities or a plurality of concavities, the top surface of each of the convexities or the bottom surface of each of the concavities is substantially parallel to a surface of the flat part; distances between the centers of adjacent convexities or concavities are not equal; the convexities have a uniform height, or the concavities have a uniform depth; the first region group is formed, with the first regions arrayed inside at a regular pitch.

A laser-assisted method embeds luminescent taggant particles in the surface of a substrate to provide a covert method of evaluating the authenticity of articles so treated.

A laser-assisted method embeds luminescent taggant particles in the surface of a substrate to provide a covert method of evaluating the authenticity of articles so treated.

A method for producing a multilayer body with the steps of a) applying a first varnish layer made of a water-based photoresist to a surface of a base body; b) exposing the first varnish layer in a first region, wherein the first varnish layer is not exposed in a second region; c) removing the first varnish layer in the second region.

A method for producing a multilayer body with the steps of a) applying a first varnish layer made of a water-based photoresist to a surface of a base body; b) exposing the first varnish layer in a first region, wherein the first varnish layer is not exposed in a second region; c) removing the first varnish layer in the second region.

An apparatus for applying security elements, comprises at least one value document substrate transport device for transporting a value document substrate web, at least one security elements transport device for transporting a security elements carrier band having a plurality of security elements, wherein the security elements carrier band has a first and a second main surface which oppose each other, each security element has a first and a second main surface which oppose each other, each security element is arranged with its first main surface on the first main surface of the security elements carrier band, and each security element has adhesive properties at its second main surface, wherein the apparatus has an application region in order to apply the security elements with their second main surface onto the value document substrate web. A security elements carrier band and a value document involve the apparatus.

An apparatus for applying security elements, comprises at least one value document substrate transport device for transporting a value document substrate web, at least one security elements transport device for transporting a security elements carrier band having a plurality of security elements, wherein the security elements carrier band has a first and a second main surface which oppose each other, each security element has a first and a second main surface which oppose each other, each security element is arranged with its first main surface on the first main surface of the security elements carrier band, and each security element has adhesive properties at its second main surface, wherein the apparatus has an application region in order to apply the security elements with their second main surface onto the value document substrate web. A security elements carrier band and a value document involve the apparatus.

A method of making a metallic credit card from an existing plastic credit card including the steps of cutting the existing plastic credit card from each side edge, peeling the plastic top layer from its bottom plastic substrate, removing its EMV chip, and attaching it to a metallic substrate. The metallic substrate can further be laser engraved with the user's personal information.

A method of making a metallic credit card from an existing plastic credit card including the steps of cutting the existing plastic credit card from each side edge, peeling the plastic top layer from its bottom plastic substrate, removing its EMV chip, and attaching it to a metallic substrate. The metallic substrate can further be laser engraved with the user's personal information.