Initially influenced by the minimalist Bauhaus style, she soon developed her own distinctive Structuralist approach to weaving, becoming one of Denmark's most important contributors to tapestry.
After attending courses in painting, Franka Duden studied at the Kunstgewerbeschule (School of Arts and Crafts) in Frankfurt (1928–29), where she met her future husband, the painter Peter Christian Rasmussen (1897–1935).
[3] After Paul Rasmussen had accepted a position at the newly established Kunsthåndværkerskole (Arts and Crafts School) in Copenhagen, the couple moved to Denmark.
After her husband's premature death in 1935, Rasmussen began to teach herself, obtaining a permanent position at the Arts and Crafts School in 1940.
Her earlier tapestries and woven creations were inspired by nature but they evolved towards experimental, structuralistically formatted designs, often made of coarse yarns.