These cash boxes are equipped with time locks, multiple sensors and Radio Frequency Identification (RFID). All non-expected events – i. e. forced entry, abnormal temperature variations, electromagnetic fields or electrostatic discharges, gas or liquid presence – will trigger a loud siren, accompanied by dense red smoke and positioning with the aid of GPS-GPRS locating signals. But that’s not enough. Rectangular shaped ink cartridges made of CONTURAX® Pro glass from SCHOTT are at the heart of this security system. If the system that can be controlled electronically causes them to burst by activating a detonator, purple colored indelible ink will immediately saturate the bank notes and thus make them completely worthless. Easy come, easy go, as they say. “For us, quality means security based on reliability,” explains Eric Hauw, Director of Sales and Operations at Oberthur Cash Protection. “Our products, the components and technologies we are using must meet the highest standards. This is the only way to guarantee our customers one hundred percent protection in the critical phase of money transportation.” Oberthur Technologies receives the pre-filled ink cartridges from Société SAV, a company based in Joinville le Pont, near Paris, that specializes in chemicals and laboratory devices. SAV segments the glass tubing supplied by SCHOTT, molds it into containers and then fills them with dyes. The high chemical stability of the borosilicate glass ensures that the properties of the permanent ink are preserved lastingly.
“In order to be able to manufacture glass cartridges, we require glass tubing that has a rectangular shape and uniform thin side walls,” explains Jean Luc Beutler, General Manager of SAV. “CONTURAX® Pro is the only product that meets these specifications. It has the ideal chemical and mechanical properties and can be processed extremely accurately, in addition to its good machinability,” he adds.
Modern cash boxes make life extremely difficult for robbers (01): They not only trigger a loud siren, produce red smoke and send signals that allow for their position to be tracked when they are opened without authorization, they also use CONTURAX® Pro profile glass tubes from SCHOTT for rectangular ink cartridges (02) that burst when they are a ignited. This permanent ink makes the banknotes completely worthless (03)
SCHOTT manufactures seamless CONTURAX® Pro profiled tubes in a wide variety of shapes, including triangular, rectangular, hexagonal, and lots of others, with the help of a patented continuous drawing process. This allows processors to avoid costly conversion processes. The tubes are available in lengths of up to almost 4 meters and wall thicknesses of between 0.2 and 5 millimeters. Tubes with a wall thickness of 1.75 millimeters and extremely low tolerance of +/– 0.15 millimeters are needed to produce these ink containers made of glass. The rectangular shape of the ink cartridges allows for space-saving integration into the cash box. At the same time, the square shaped profile tube breaks more easily and evenly than a round tube when the trigger is pulled inside this security application.
“It’s quite exciting and inspiring to enable new applications that meet such high requirements,” says Jean Krystkowiak, Regional Sales Director EMEA for Technical Tubing at SCHOTT AG. “Normally, our glass needs to be as durable and strong as possible. With these ink cartridges, however, our tubes are expected to break quickly and evenly, without getting damaged during manufacturing or while they are being transported.”
So far, this intelligent cash protection system from Oberthur has been introduced mainly in Western Europe. Now, the company is expecting expansion of its customer base to include other regions of the world. “Simply knowing that these glass ink containers make stolen bank notes unusable for criminals acts as a deterrent and could well prevent acts of violence,” adds Jean Krystkowiak from SCHOTT. “We are pleased to be able to contribute to this,” he concludes.
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