Use of inorganic particles and method for marking and...

C - Chemistry – Metallurgy – 09 – D

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C09D 11/02 (2006.01) B41F 17/00 (2006.01) B41M 3/14 (2006.01) B42D 15/10 (2006.01) B44F 1/12 (2006.01) G06K 19/06 (2006.01)

Patent

CA 2315064

The present invention relates to inorganic particles comprising at least two chemical elements in a predefined and analytically identifiable ratio. These particles are used as a marking means incorporated into or applied onto any desired article. They provide a high security potential against counterfeiting since the analysis depend on a combination of spatial as well as of chemical information. In a first step the information containing particle has to be localized by scanning electron microscopy and in a second step the ratio of elements is analysed using energy- or wavelength-dispersive X-ray analysis (SEM/EDX).

La présente invention concerne des particules inorganiques comprenant au moins deux éléments chimiques en un rapport prédéfini et identifiable par voie analytique. Ces particules sont utilisées comme moyen de marquage incorporé ou appliqué à n'importe quel article désiré. Elles permettent d'obtenir un potentiel de sécurité élevé contre la contrefaçon étant donné que l'analyse dépend d'une combinaison d'informations à la fois spatiales et chimiques. Dans une première étape, la particule contenant les informations doit être localisée par microscopie électronique à balayage et dans une seconde étape le rapport des éléments est analysé par analyse par rayons X à dispersion d'énergie - en longueur d'onde (SEM/EDX).

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