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Gertrud Preiswerk was a Swiss textile designer she was born in Basel. Between 1926 and 1930, she trained in-the weaving workshop, Bauhaus, Dessau, under Gunta Stolzl. In 1929, she took a summer course, Johanna Brunsons’s Weaving School, Stockholm. She studied the operation of silk power looms at Vereinigte Seiden Webereien.
She settled in Hildesheim; in-1931, (with Heinrich Otto Hürlimann and Gunta Stolzl) founded the firm SPH Stoffe, Zurich. Until 1933, SPH Stoffe collaborated with the Wohnbedarf department store, Zürich.
Source
Byars, M., & Riley, T. (2004). The design encyclopedia. Laurence King Publishing.