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Goniospectrophotometry

A spectrophotometric technique that measures reflectance spectra at multiple illumination and viewing angle combinations simultaneously, enabling quantitative characterisation of OVI colour-shift profiles for comparison against authenticated note references.

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BOPP (biaxially oriented polypropylene)Europol PEX (Project Ester)FICN (Fake Indian Currency Notes)Fluorescent security inkIntaglio printingOptically variable ink (OVI)Security threadSICPA OVIUSSS Counterfeit Division

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