Plastic sheeting, as used in architecture today, allows the creation of building skins that are unsurpassed in their permeability to light and UV radiation. The fluoropolymer material ethylene-tetrafluoroethylene (ETFE) has proved most effective in this context. Its extremely low weight (350 g/m2 for a thickness of 200 µm), its high permeability to light, its great chemical resistance to acids and...