General view of an unidentified man measuring a piece of Styrofoam insulation at a construction site. 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. “Styrofoam Insulation at Construction Site,” 1991. Dow Chemical Company Historical Image Collection, Box 4, Folder Products--Styrofoam Insulation. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/tq57ns19h.
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