Abstract: A security element and a value document having such a security element in the form of a strip having a first and second polymer layer are shown, having a visually recognizable halftone printed image, which is luminescent under UV radiation, between the first and second layer, wherein the halftone printed image has an opacity and forms at least one imprint area having a boundary contour within the security element. To increase the forgery protection, it is proposed that at least one of the two polymer layers have an opacity at least in the region of the boundary contour of the imprint area and be adapted in its opacity to the opacity of the imprint area, in order to diminish the visual recognizability of the boundary contour of the imprint area of the luminescent halftone printed image on the security element.

Abstract: A value document having a security element in the form of a strip with a first polymer layer which comprises at least one embossed diffraction structure, having at least one reflection layer which visually interacts with the diffraction structure in order to form a reflection hologram as the first visually recognisable security feature, and having at least one imprint which is luminescent under UV radiation and which forms a second security feature that is visually recognisable under UV light, wherein the reflection hologram comprises at least one see-through region on the second security feature. In order to increase the level of protection against forgery of the security element, the luminescent imprint comprises a halftone print image, and the see-through region is formed by at least one recess in the reflection layer and by the polymer layer which is free in this region of the recess from the diffraction structure at least above the halftone print image of the imprint.

Abstract: A security element (100, 101) and a value document (200, 201) having such a security element (100, 101) in the form of a strip having a first (1) and second polymer layer (2) are shown, baying a visually recognizable grid primed image (3), which is luminescent under UV radiation, between the first (1) and second layer (2), wherein the grid printed image (3) has an opacity and forms at least one imprint area (5) having a boundary contour (4) within the security element (100, 101). To increase the forgery protection, it is proposed that at least one of the two polymer layers (1, 2) have an opacity at least in the region of the boundary contour (4) of the imprint area (5) and be adapted in its opacity to the opacity of the imprint area (5), in order to diminish the visual recognizability of the boundary contour (4) of the imprint area (5) of the luminescent grid printed image (3) on the security element (100, 101).

Abstract: A value document having a security element in the form of a strip with a first polymer layer which comprises at least one embossed diffraction structure, having at least one reflection layer which visually interacts with the diffraction structure in order to form a reflection hologram as the first visually recognisable security feature, and having at least one imprint which is luminescent under UV radiation and which forms a second security feature that is visually recognisable under UV light, wherein the reflection hologram comprises at least one see-through region on the second security feature. In order to increase the level of protection against forgery of the security element, the luminescent imprint comprises a halftone print image, and the see-through region is formed by at least one recess in the reflection layer and by the polymer layer which is free in this region of the recess from the diffraction structure at least above the halftone print image of the imprint.

Abstract: The method of making a luminescent pattern comprises the steps of: subdividing the pattern into an array (2) comprising a plurality of non-overlapping cells (3); on the basis of at least two luminescent materials that emit radiation of different colors when they are excited, and for each cell, determining a dot of luminescent material having dimensions that are no greater than the dimensions of the cell, and having a color that is appropriate for the radiation from adjacent dots in combination to reconstitute a corresponding zone of the pattern; and printing the dots (4) as determined in this way in the corresponding cells of the array. The invention also relates to a luminescent pattern comprising a series of non-overlapping luminescent dots of at least two luminescent materials that emit different colors when they are excited, at least some of the dots emitting colors that combine to form at least a third color.