Josef Frank designed several bentwood chairs during the late 1920s, some of which were produced for Thonet-Mundus AG in Vienna. Josef Frank was inspired by how Thonet-Mundus chairs were functional and easy to move, and he furnished his Tea Salon in Vienna 1930 with painted bentwood furniture that he designed himself. Chair P4’s and P5’s original sketches are preserved in Svenskt Tenn’s archives, and are manufactured today with the same technique as then.
Today, they are manufactured at Gemla Fabrikers AB, Sweden's oldest furniture factory, located at the small town of Diö in Småland. In the 19th century, craftsmen from Bohemia came to Diö, bringing with them the knowledge and experience from Thonet's factories. They became the first to introduce the bentwood technique in Sweden and are the only manufacturer mastering the art of bending solid wood with steam.