Stölzl considered the workshop a place for experimentation and encouraged improvisation. She and her students, especially Anni Albers, were very interested in the properties of a fabric and in synthetic fibers. They tested materials for qualities such as color, texture, structure, resistance to wear, flexibility, light refraction and sound absorption. Stölzl believed the challenge of weaving was to create an aesthetic that was appropriate to the properties of the material. In 1930, Stölzl issued the first ever Bauhaus weaving workshop diplomas and set up the first joint project between the Bauhaus and the Berlin Polytex Textile company which wove and sold Bauhaus designs. 1In 1931 she published an article entitled “The Development of the Bauhaus Weaving Workshop”, in the Bauhaus Journal spring issue. Stölzl's ability to translate complex formal compositions into hand woven pieces combined with her skill of designing for machine production made her by far the best instructor the weaving workshop was to have. Under Stölzl's direction, the weaving workshop became one of the most successful faculties of the Bauhaus.