General view of an unidentified employee examining assorted pieces of Styrofoam at a Dow Chemical Company facility. Invented in 1941 by researchers in Dow's Chemical Physics Lab, "Styrofoam" properly refers to the Dow Chemical Company’s trademarked brand of closed-cell extruded polystyrene foam commonly used for thermal insulation and craft applications.
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Dow Chemical Company. “Examining Pieces of Styrofoam at Dow Chemical Company,” 1951. Dow Chemical Company Historical Image Collection, Box 4, Folder Products--Styrofoam. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/tx31qj223.
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