General view of a promotional display for Styrofoam insulation detailing the material's efficiency, cost-effectiveness, and resistance to rot, mold, and deterioration. 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. “Promotional Display for Styrofoam Insulation,” 1964. Dow Chemical Company Historical Image Collection, Box 4, Folder Products--Styrofoam Insulation. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/fq977v81c.
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