Giesecke & Devrient Gmbh

Giesecke+devrient Currency Technology Gmbh

Gregor Grauvogl

Wittich Kaule

Thomas Giering

Ulrich Magg

Ulrich Scholz

Friedrich Kretschmar

Peter Kersten

Gerhard Schwenk

Theodor Burchard

J&uuml;rgen Sch&uuml;tzmann

Klaus Thierauf

Kai Uwe Stock

Franz Müller

Ralf Liebler

Stephan Heer

Wolfgang Wensauer

Horst Reigl

Thomas Bodendieck

Jürgen Ruck

A feature substance is provided for securing the authenticity of documents of value, having at least one luminescent substance in particle form and nanoparticles enveloping the surfaces of the luminescent substance particles at least partially, wherein the properties of the feature substance result from the interaction of the properties of the luminescent substance and of the nanoparticles. The invention furthermore relates to a method for producing the feature substance, a method for securing the authenticity of a security element or document of value using a feature substance, as well as security elements and documents of value with authenticity features on the basis of the feature substance.

Securing the authenticity of value documents by means of characteristic substances

A security element has at least two luminescent substances, in which the security element has a first and a second luminescent substance which have a substantially identical, joint emission band. The first or the second luminescent substance, or both luminescent substances, have at least one excitation band that leads to an emission at the joint emission band only in the case of the first or the second luminescent substance.

Authenticity feature in the form of luminescent substances

The invention relates to a security element having at least two luminescent substances. The invention starts out from a security element having at least two luminescent substances, whereby the security element has a first and a second luminescent substance which have a substantially identical, joint emission band, whereby at least the first or the second luminescent substance, or both luminescent substances, have at least one excitation band that leads to an emission at the joint emission band only in the case of the first or the second luminescent substance.

A sheet-shaped document of value (BN) has luminescent feature substances (). Preferably, one luminescent feature substance is present over the entire sheet-shaped document and has a low concentration, whereas a second luminescent feature substance is present at certain partial areas and has a higher concentration.

Value document, production and verification of value documents

A printed document of value has an authenticity feature in the form of at least two luminescent substances on the basis of host lattices which are doped with one or a plurality of ions. By systematically changing the host lattices and/or ions of the (nd)electron configuration a specific setting of the luminescence properties of luminescent substances is possible, the combination of which permits a multiplicity of complex new authenticity features.

Authenticity mark in the form of luminescent substances

The invention relates to a printed value document having at least one luminescent substance.

Valuable document

The invention relates to a security device having at least one plastic layer and one specularly reflecting metal layer. An inorganic auxiliary layer is disposed between the plastic layer and the metal layer.

Security device and method for producing it

Security element and method for producing same

The invention relates to a method for producing a foil material wherein a plastic foil is provided with a lacquer layer having variable viscosity, and a relief structure is then embossed into the lacquer layer. At least during application of the lacquer layer and during the embossing process the viscosity of the lacquer layer is adjusted to a predetermined value and kept constant during the particular phase of operation. The invention fixer relates to an apparatus for carrying out this method.

Method and device for producing a foil material

A transfer foil for use in a safety document includes a multilayer structure having a carrier layer and a plastic layer in which diffraction structures, for example holographic structures, are embossed in the form of a relief structure and which is combined with a reflective layer. The plastic layer includes a reaction lacquer layer selected from the group consisting of cationical curing lacquers, blue light-curing lacquers and chemical curing multicomponent lacquers.

Security document and method of producing it

The invention relates to a multilayer foil, in particular a transfer foil. The transfer foil consists of a carrier. foil, a one- or multilayer transfer layer containing an optically variable structure, and an intermediate layer located between the carrier foil and the transfer layer, the intermediate layer being a metal oxide or semiconductor oxide layer.

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Oberhaching, Germany

Gregor Grauvogl