Security Feature for Value Documents

The present invention relates to a security feature for security papers, value documents and the like having an acid-labile feature substance as the core and a shell consisting substantially of metal oxide, the security feature exhibiting greater stability against the action of acids compared with t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HOPPE RAINER, GIERING THOMAS
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES BOOK COVERS BOOKBINDING CHECKING-DEVICES CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR DYES FILES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING IMPREGNATING OR COATING OF PAPER INORGANIC CHEMISTRY LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM LOOSE LEAVES MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MOVABLE-STRIP WRITING OR READING APPARATUS NATURAL RESINS PAINTS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PERFORMING OPERATIONS PHYSICS POLISHES PREPARATION OF CARBON BLACK PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR PRODUCTION OF CELLULOSE PULP COMPOSITIONS SPECIAL PRINTED MATTER TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TEXTILES TRANSPORTING TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
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Beschreibung
Zusammenfassung:	The present invention relates to a security feature for security papers, value documents and the like having an acid-labile feature substance as the core and a shell consisting substantially of metal oxide, the security feature exhibiting greater stability against the action of acids compared with the acid-labile feature substance.