USE OF RADIOFREQUENCY WAVE ABSORBING MARKERS FOR THE AUTHENTICATION OF SECURITY DOCUMENTS

The present invention relates to the use of non-deactivatable security compositions comprising the combination of at least two types of particles of oxide materials, where said particles have a different size and/or morphology, and where the inorganic oxide materials have at least one transition met...

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Bibliographische Detailangaben
Hauptverfasser:	RODRÍGUEZ BARBERO, MIGUEL ÁNGEL, ROMERO FANEGO, JUAN JOSÉ, FERNÁNDEZ LOZANO, JOSÉ FRANCISCO, GARCÍA JUEZ, VICENTE, GAMO ARANDA, JAVIER
Format:	Patent
Sprache:	eng ; spa
Schlagworte:	ADHESIVES CHECKING-DEVICES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COLOUR PRINTING CORRECTING FLUIDS DYES FILLING PASTES HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING INKS LINING MACHINES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS PHYSICS POLISHES PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES STAMPS TRANSPORTING TYPEWRITERS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The present invention relates to the use of non-deactivatable security compositions comprising the combination of at least two types of particles of oxide materials, where said particles have a different size and/or morphology, and where the inorganic oxide materials have at least one transition metal or one lanthanide element, and radiofrequency wave absorption properties. The invention also relates to security articles, documents or elements incorporating these compositions, as well as to a method and to a system for detection thereof. La presente invención se refiere al uso de composiciones de seguridad no desactivables que comprenden la combinación de al menos dos tipos de partículas de materiales óxidos, donde dichas partículas presentan diferente tamaño y/o morfología, y donde los materiales óxidos inorgánicos contienen al menos un metal de transición o un elemento lantánido, y propiedades de absorción de ondas de radiofrecuencia. La invención también se refiere a artículos, documentos o elementos de seguridad que incorporan estas composiciones, así como a un método y a un sistema de detección de las mismas.