The roll-to-roll process for the production of printed electronics has a long-established role model: newspaper printing. In this process, unprinted carrier material is winded up on a roll, with an empty roll on the opposite side. The individual printing processes run one after the other in between, with the carrier material being spooled onto the empty roll on the other side of the press. In the laboratories of Fraunhofer EMFT, researchers use this method to produce ultra-thin electronic components on film. These electronic foils are used, for example, in medical technology as sensors close to the body, in robotics and also in solar cells. The so-called "roll-to-roll" process is particularly efficient for such large-area components.