General view of an unidentified employee at work in a laboratory at the Rohm and Haas Company home office located at West Washington Square in Philadelphia.
The Rohm and Haas Company was founded in 1907 in Esslingen, Germany through the partnership of German chemist Otto Röhm and German businessman Otto Haas. In 1933, Röhm's experiments with the polymerization of methyl methacrylate led to the creation of a clear, solid plastic sheet, which he trademarked Plexiglas. During World War II, the demand for Plexiglas, which both Allied and Axis forces used for submarine periscopes and aircraft windshields, canopies, and gun turrets, helped transform Rohm and Haas into a major chemical firm.
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Rohm and Haas Company. “Employee at Work in Rohm and Haas Company Laboratory,” 1930–1939. Rohm & Haas Company Archives, Box Photos 2, Folder 5. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/e8iribj.
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