Two views of hot relaxing plates on a drawing machine used at the DuPont plant in Seaford, Delaware during the early stages of synthetic fiber production and research. The plate on the left was electric-heated and the plate on the right was steam-heated. During production, synthetic fibers were cold-drawn on hot plates in order to strengthen the fiber. The fiber seen here is believed to be "Fiber V," later branded as Dacron polyester fiber.
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“Hot Relaxing Plates on Drawing Machine,” March 1, 1946. Joseph X. Labovsky Collection of Nylon Photographs and Ephemera, Box 2. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/3r074v38c.
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