Review article

Infrared barrier scanning of continuous color disappearing on forged valuables

Petra Poldrugač ; Odjel nacionalnih centara za borbu protiv krivotvorenja i analizu novčanica i kovanog novca, Direkcija trezora, Hrvatska narodna banka, Trg hrvatskih velikana 3, 10002 Zagreb, Hrvatska
Ernela Šop ; Odjel za izdavanje, kontrolu i preuzimanje vrijednosti, Direkcija trezora, Hrvatska narodna banka, Trg hrvatskih velikana 3, 10002 Zagreb, Hrvatska

Abstract

The article presents valuables expertise in the infrared spectrum with barrier scanning in order to prove authenticity. Suggestions are given for analyzing forgery information under the soft, intermediate and hard IR radiation. Basic characteristics of pigments are used to create a selected graphic information of color disappearing. Precise scanning was conducted by video spectral comparator with filters for visible and invisible part of the spectrum. Digital databases were created for documenting the results. The importance of IR spectrum separation in thirteen sections is highlighted in order to improve qualitative and quantitative way of information disappearing.

Keywords

barrier scanning; forgery; infrared; valuables

Hrčak ID:

65937

URI

https://hrcak.srce.hr/65937

Publication date:

31.3.2011.

Article data in other languages: croatian

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