The “Plastic Back Chair” was created as a diploma project at ECAL. Designed with the production of small series in mind, the chair is notable for its unusual combination of materials, a sophisticated structure and the resulting idiosyncracy of its formal appearance. While the lower frame has been welded together from aluminium profiles, the seat consists of a piece of aluminium sheet metal. The back of the chair, on the other hand, is made of polypropylene film. A fold along the upper edge, together with the special connection with the rest of the chair body, gives the thin film the tension it needs to provide reliable support for a seated person.