A display technique capable of displaying special images. A display includes an image display layer and a mask layer. The image display layer includes one or more colored portions, and displays a transmitted light image corresponding to the one or more colored portions when illuminated with white light. The mask layer includes a transparent material layer having a first major surface and a second major surface, and the first major surface includes one or more regions each composed of first and second strip-shaped parts alternately arranged in a width direction. The second strip-shaped parts are provided with a relief structure. A portion of the mask layer corresponding to at least one of the one or more regions conceals a portion of the transmitted light image corresponding to the second strip-shaped parts.

A display technique capable of displaying special images. A display includes a light shielding layer having a plurality of slits arranged at intervals in a width direction thereof, and an image recording layer that faces a first major surface of the light shielding layer at an interval and in which a latent image is recorded, the latent image being rendered visible by being partially concealed by the light shielding layer.

Disclosed is an ink comprising a transparent matrix being UV curable and heat scalable, and at least one pigment component. The ink in its UV-cured state has a peel strength in the range of about 6 to 8 N/cm, wherein this adhesiveness is achievable by means of a further lamination step under the influence of pressure and heat so that the ink acts as a hot glue. Further disclosed is a safety structure comprising a semitransparent layer being formed at least partially by the UV-cured ink, and a secure article comprising the safety structure. Further disclosed is a use of the ink for silkscreen printing.

Disclosed is an ink comprising a transparent matrix being UV curable and heat scalable, and at least one pigment component. The ink in its UV-cured state has a peel strength in the range of about 6 to 8 N/cm, wherein this adhesiveness is achievable by means of a further lamination step under the influence of pressure and heat so that the ink acts as a hot glue. Further disclosed is a safety structure comprising a semitransparent layer being formed at least partially by the UV-cured ink, and a secure article comprising the safety structure. Further disclosed is a use of the ink for silkscreen printing.

This disclosure relates to counterfeit detection and deterrence using advanced signal processing technology including steganographic embedding and digital watermarking. Digital watermark can be used on consumer products, labels, logos, hang tags, stickers and other objects to provide counterfeit detection mechanisms.

This disclosure relates to counterfeit detection and deterrence using advanced signal processing technology including steganographic embedding and digital watermarking. Digital watermark can be used on consumer products, labels, logos, hang tags, stickers and other objects to provide counterfeit detection mechanisms.

According to a first aspect of the invention, there is provided a method of deriving information from an optically readable security element, comprising: optically reading the optically readable security element, the optically readable security element comprising at least one optically readable structure, optically readable in response to excitation of the optically readable structure; the reading comprising determining data indicative of an optical property of the optically readable security element using first emission electromagnetic radiation, emitted in response to excitation of the optically readable structure; the deriving information further comprising using the determined data indicative of an optical property, in combination with a temporal excitation-emission relationship related to the optically readable structure, to derive the information.

According to a first aspect of the invention, there is provided a method of deriving information from an optically readable security element, comprising: optically reading the optically readable security element, the optically readable security element comprising at least one optically readable structure, optically readable in response to excitation of the optically readable structure; the reading comprising determining data indicative of an optical property of the optically readable security element using first emission electromagnetic radiation, emitted in response to excitation of the optically readable structure; the deriving information further comprising using the determined data indicative of an optical property, in combination with a temporal excitation-emission relationship related to the optically readable structure, to derive the information.

A method for producing an electronic document (30) comprising a concealed magnetic strip, comprising a step (22) of providing a surface (310) of an electronic document body (30), a step (23) of applying of a magnetic strip (33) to at least part of the surface (310) of the electronic document body (30), a visible surface (34), formed by the surface (310) of the body covered at least in part by the magnetic strip (33), having a Delta E contrast equal to or less than 15, and a step (24, 25, 26) of applying a decor (32) that covers the surface (310) of the body over the magnetic strip (33), the decor (32) having a thickness of at most 10 μm and having an opacity ratio at wavelengths in the visible domain of at least 70%; and a corresponding electronic document (30).

A method for producing an electronic document (30) comprising a concealed magnetic strip, comprising a step (22) of providing a surface (310) of an electronic document body (30), a step (23) of applying of a magnetic strip (33) to at least part of the surface (310) of the electronic document body (30), a visible surface (34), formed by the surface (310) of the body covered at least in part by the magnetic strip (33), having a Delta E contrast equal to or less than 15, and a step (24, 25, 26) of applying a decor (32) that covers the surface (310) of the body over the magnetic strip (33), the decor (32) having a thickness of at most 10 μm and having an opacity ratio at wavelengths in the visible domain of at least 70%; and a corresponding electronic document (30).