摘要:
The invention concerns a method for producing a luminescent pattern comprising the following steps: breaking down the pattern in accordance with a raster (2) comprising a series of non-overlapping cells (3); for each cell, determining from at least two luminescent materials emitting radiation at different colours when excited, a luminescent material dot having dimensions at most equal to the cell, and an appropriate colour such that one combination of different types of radiation of adjacent points recreate a corresponding zone of the pattern; printing the dots (4) thus determined in the corresponding cells of the raster. The invention also concerns a luminescent pattern comprising a series of non-overlapping dots of at least two luminescent materials emitting different colours when excited, at least one part of the dots emitting colours combining to produce at least a third colour.
摘要:
The method for the production of paper secured by a ribbon comprises the following steps: a fabric is made of synthetic fibres having a diameter which is at least equal to half of the nominal thickness of the fabric to be produced; the fabric is crushed when hot in order to achieve the nominal thickness; the fabric is cut according to a ribbon: paper is produced from pulp and the ribbon is incorporated into the paper.
摘要:
The invention concerns a method for producing a security document having an opaque fibrous texture, so as to constitute on the surface of the document at least a highly transparent zone. The invention is characterised in that the method comprises a local treatment of the fibrous texture of the document in said zone, so as to enhance its transparency, and the method comprises the exposure of the locally treated zone to the vibration of a sonotrode at an ultrasonic frequency.
摘要:
The inventive safety device comprises a transparent substance layer (4) having a refraction index and a thickness suitable for forming a waveguide and containing at least one type of a photoluminescent product. One of the faces of said waveguide layer is provided with a light-extraction pattern (10) which locally disrupts a waveguide effect.
摘要:
The invention concerns a method for making a security document comprising an integrated circuit, characterized in that the method comprises constituting, directly on part of the document, an integrated circuit.
摘要:
The invention relates to a secure document comprising at least one security element containing at least one area having a colour which, when photocopied, is reproduced without, or with only a slight infrared-opaque component. The invention also comprises at least one security mark which extends inside the aforementioned area and which is made from an infrared-opaque security material having a colour which, which, when photocopied, is reproduced without, or with only a slight infrared-opaque component.