Title:
USE OF INORGANIC PARTICLES AND METHOD FOR MARKING AND IDENTIFYING A SUBSTRATE OR AN ARTICLE
Document Type and Number:
WIPO Patent Application WO1999034315
Kind Code:
A9
Abstract:
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).
Inventors:
ROZUMEK OLIVIER
MUELLER EDGAR
MUELLER EDGAR
Application Number:
PCT/EP1998/008452
Publication Date:
November 18, 1999
Filing Date:
December 22, 1998
Export Citation:
Assignee:
SICPA HOLDING SA (CH)
International Classes:
B42D15/00; B42D15/10; C09C1/00; C09D7/12; B41M3/14; C09D201/00; D21H21/40; G06K1/12; G06K7/00; G06K19/06; (IPC1-7): C09D11/00; B41M3/14; B42D15/00; G06K19/06
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