Method of using thermochromic material on security documents and product

Method of using thermochromic material on security documents and product

A method of document security comprising providing a substrate having a spot of thermochromic material printed thereon capable of undergoing a reversible color change upon exposure to heat, associating alpha instructional information with the spot, reproducing the alpha information on a second subst...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: GREGORY, JR., VANCE P
Format: Patent
Sprache:eng
Schlagworte:
CHECKING-DEVICES
COLOUR PRINTING
HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING
LINING MACHINES
PERFORMING OPERATIONS
PHYSICS
PRINTING
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES
STAMPS
TRANSPORTING
TYPEWRITERS
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Beschreibung
Zusammenfassung:A method of document security comprising providing a substrate having a spot of thermochromic material printed thereon capable of undergoing a reversible color change upon exposure to heat, associating alpha instructional information with the spot, reproducing the alpha information on a second substrate, and subjecting the second substrate to heat to determine whether the document is original or authentic.