摘要:
A security document having a first side (11) and a second side (12), the security document comprising a first pattern (31) and a second pattern (32) located closer to the second side (12) than the first pattern (31), the first pattern (31) and the second pattern (32) overlapping such that the overlapping area defines a shape of a security pattern (40).The first pattern (31) comprises first single fluorescent substance adapted to emit first visible light (61), and the second pattern (32) comprises second single fluorescent substance adapted to emit second visible light (62).When the security pattern (40) is irradiated from the direction of the first side (11) the first visible light (61) dominates the second visible light (62) at the first excitation radiation (51) and the second visible light (62) dominates the first visible light (61) at the second excitation radiation (52).
摘要:
The invention relates to a process for securing an identification document and to a secure identification document. More particularly, the process uses UV sensitive ink(s) to define a pattern only visible under UV radiations, by printing a first layer of a transparent ablation varnish (13), printing a layer (14) of UV sensitive ink(s) over said first layer of transparent ablation varnish, removing parts of the layer (14) of UV sensitive ink(s), by means of a laser beam, some remaining areas of said UV sensitive ink(s) defining said pattern to be revealed in color under UV radiations, and some areas, where the UV sensitive ink(s) has been removed and the laser beam has interacted with the ablation varnish (13), absorbing the UV radiations with effect of creating black color. Other systems and methods are disclosed.
摘要:
The invention relates to an enhanced security feature for identification document. For that, the identification document comprises at least two constitution layers, a first specific coating (15) inside the document, between two constitution layers, said coating being able to be revealed under predetermined lighting conditions. It comprises also an assembly of micro-holes (16) provided through at least one of the layers, in order to make possible the revelation of the first specific coating under said predetermined conditions, said assembly of micro-holes, together with said coating to be revealed through micro-holes, drawing said security pattern.
摘要:
A security document (1-1), comprising at least a first layer (2-2) and a second layer (2-4) above the first layer (2-2), the second layer (2-4) being of optically variable ink, and one or more personalization elements, the second layer (2-4) comprising one or more wholly ink free areas (2-12, 2-16, 2-21) that are optically variable elements of the one or more personalization elements and/or one or more partly ink free areas (2-14) that are optically variable elements of the one or more personalization elements.
摘要:
The invention relates to a process for securing an identification document and to a secure identification document. More particularly, the process uses UV sensitive ink(s) to define a pattern only visible under UV radiations. The process is characterized in that it comprises the following steps: printing a first layer of a transparent ablation varnish (13), printing a layer (14) of UV sensitive ink(s) over said first layer of transparent ablation varnish, removing parts of the layer (14) of UV sensitive ink(s), by means of a laser beam, some remaining areas of said UV sensitive ink(s) defining said pattern to be revealed in color under UV radiations, and some areas, where the UV sensitive ink(s) has been removed and the laser beam has interacted with the ablation varnish (13), absorbing the UV radiations with effect of creating black color.