High-Frequency Welding of Projection Screens What you need is very fine seams! At our High Frequency (HF) foil welding facilities, all projection films [link to projection films] made of non-rigid PVC with virtually invisible weld seams. These seams measure less than 1mm in width, they are almost level due to a special welding procedure, and, despite their fineness, extremely durable. Thus, when finished the single foil sheets seem to be welded together only along their edges. As the seams never overlap, and due to their fine quality, they are especially suited for transmitted light projection and highlighting in the theatre or at show events as they effectively prevent ugly welding bulges or cast shadows. Any shape and size available! We have produced foils of miniature proportions (0.5 x 0.5m) up to horizon foils of 23 x 20m and more, also circles, polygons, door cut-outs, waveforms – anything is possible. We possess a specially constructed HF machine for such custom-made designs. Blow it up! Our HF welder can do anything – from gastight bodies, displays, sculptures, balls of any shape and size, including welded-in things from the gimmick to the airplane – he is one of the (very) few true masters of his trade, and happy to fulfil even the most unusual of wishes.