An inlay sheet for a book-like identification document. The inlet sheet may include a first hinge layer comprising polycarbonate and a second hinge layer comprising a flexible material different to polycarbonate, e.g. PET, polyurethane, fabric, mesh. The second hinge layer is attached to the first hinge layer. A first datapage layer and a second datapage layer are attached to the first hinge layer and the second hinge layer, respectively, such that the first and second hinge layers are positioned between the first and second datapage layers for forming a datapage section having a datapage thickness. The first and second datapage layers form a common datapage inner front edge and the first and second hinge layers extend beyond the common datapage inner front edge such that a hinge section is formed having a hinge thickness smaller than the datapage thickness.

The invention proposes a document configured to generate a color image, comprising: a set of pixels printed on or in a substrate, each pixel forming a pattern including an arrangement of sub-pixels of at least two different colors; and an array of lenses disposed opposite the set of pixels so as to generate the color image by focusing or diverging an incident light through the lenses on at least part of the sub-pixels, each lens being positioned, relative to a facing associated pixel, to focus or diverge the incident light on at least one of the sub-pixels of said associated pixel so as to modify the contribution of the respective colors of the sub-pixels of the associated pixel, in a region of the color image generated through said lens, with respect to the pattern intrinsically formed by the associated pixel independently of said lens.

The invention proposes a document configured to generate a color image, comprising: a set of pixels printed on or in a substrate, each pixel forming a pattern including an arrangement of sub-pixels of at least two different colors; and an array of lenses disposed opposite the set of pixels so as to generate the color image by focusing or diverging an incident light through the lenses on at least part of the sub-pixels, each lens being positioned, relative to a facing associated pixel, to focus or diverge the incident light on at least one of the sub-pixels of said associated pixel so as to modify the contribution of the respective colors of the sub-pixels of the associated pixel, in a region of the color image generated through said lens, with respect to the pattern intrinsically formed by the associated pixel independently of said lens.

A method for manufacturing a card comprising a transparent window. The window comprises a front side and a back side. The method comprises steps of printing a color picture on the back side of the window and laser engraving the front side of the window. Also provided is a device configured to carry out the above-described method and a card manufactured with the above-described method.

A method for manufacturing a card comprising a transparent window. The window comprises a front side and a back side. The method comprises steps of printing a color picture on the back side of the window and laser engraving the front side of the window. Also provided is a device configured to carry out the above-described method and a card manufactured with the above-described method.

Disclosed is a security document including an image layer with in a first image area an identification image. The document has in a second image area an authentication image that is composed of a first authentication image that is a positive version of the first image and a second authentication image that is a negative version of the first image. The authentication images can be observed at different angles and form a tilt image. Mutual comparison of the positive and negative tilt images and comparison with the identification image provides improved detection of unauthorized alterations.

Disclosed is a security document including an image layer with in a first image area an identification image. The document has in a second image area an authentication image that is composed of a first authentication image that is a positive version of the first image and a second authentication image that is a negative version of the first image. The authentication images can be observed at different angles and form a tilt image. Mutual comparison of the positive and negative tilt images and comparison with the identification image provides improved detection of unauthorized alterations.

The invention concerns a method for manufacturing an identification document comprising a body with a first visual marking and a second visual marking, the first and the second visual markings depicting same identification data. The method comprises the following steps of: engraving a first area of the identification document with a first laser beam for obtaining the first visual marking; providing at least one see-through portion in a second area of the identification document; providing an optically variable printing ink patch, laminated to at least one first transparent layer located in the see-through portion; and engraving the surface of the laminated optically variable printing ink patch with a second laser beam for obtaining the second visual marking, said second laser beam having a lower power than the first laser beam.

The invention concerns also the identification document obtained by this method.

The invention concerns a method for manufacturing an identification document comprising a body with a first visual marking and a second visual marking, the first and the second visual markings depicting same identification data. The method comprises the following steps of: engraving a first area of the identification document with a first laser beam for obtaining the first visual marking; providing at least one see-through portion in a second area of the identification document; providing an optically variable printing ink patch, laminated to at least one first transparent layer located in the see-through portion; and engraving the surface of the laminated optically variable printing ink patch with a second laser beam for obtaining the second visual marking, said second laser beam having a lower power than the first laser beam.

The invention concerns also the identification document obtained by this method.

A method for building a security image for a security structure of a security document from multiplexing color images, including selecting a marking method capable of producing sets of colors on the security document comprising different colors that can be displayed according to illumination/observation modes of the security structure, establishing a plurality of color sets that can be displayed by the security structure in a plurality of the different illumination/observation modes, distributing the color sets in a plurality of groups of color sets, establishing combinations of groups of color sets having at least one color set in common across the number of different illumination/observation modes, selecting a combination of a group of color sets based on the number of desired illumination/observation modes and the number of colors per color image, and determining the color images to multiplex by means of the combination of the group of color sets selected.