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To achieve this effect in one single ink, GSI uses proprietary know-how, which was developed in less than a year together with its partner Leuchtstoffwerk Breitungen (LWB), a manufacturer of luminescent materials, special chemicals and unique types of pigments based in Germany. The traffic light effect combines well-established UV images with phosphorescence and a moving effect of interchanging colors (red, yellow, green) not previously known to the industry. The feature can be checked by police officers, retailers, banknote experts, and sorting machines using existing tools or sensors.

At its site in Berlin, Germany, GSI employs 75 highly skilled workers, physicists, chemists as well as commercial experts and generates an annual turnover in the double-digit million Euro range.

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