The invention concerns a process for the production of a personalised, optically variable element having polarising properties, and a film system for carrying out the process. In addition, guiding device 18 that conducts the display light of the LCD to the photosensitive material and exposure light source 17 for the LCD also may be installed. The brewing chamber is positioned above a pressurizable container, or carafe, having an adjustable standpipe and containing the fluid.