Depth Profiling of Diffraction-based Security Features in Authentic and Counterfeit Banknotes
Ioan Cristinel Negru, Viorica Vasilache, Ion Sandu, Romeo Iulian Olariu, Petru Ovidiu Tănasă, Daniel Potolinca, Irina Crina Anca Sandu · Materiale Plastice · 2017
High printing quality of banknotes and the variety of security features implemented in banknotes make a big difference between the genuine notes and high-quality forgeries. The counterfeiter cannot reproduce or imitate the printing quality and all security features embedded in every banknote, such as Optically Variable Ink, Optically Variable Diffractive Images, or intaglio printing. The present research focused on the examination of optically variable devices embedded on 50Îbanknotes. The altered banknotes were examined using different techniques.