Close-up view of two 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, labelled "Electric," is electric-heated while the plate on the right, labelled "Steam," is steam-heated. During production, synthetic fibers were cold-drawn on hot plates in order to strengthen the fiber. The fiber seen here is identified as "Fiber V," later branded as Dacron polyester fiber.
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“Hot Relaxing Plates on Drawing Machine,” February 46, 1946. Joseph X. Labovsky Collection of Nylon Photographs and Ephemera, Box 2. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/q237hr98n.
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