Advertisement for Dowflake Calcium Chloride, a product of the Dow Chemical Company marketed for use to enhance the durability of and speed the hardening process for concrete. The advertisement features a swirl of assorted compounds present in concrete, including silicates, aluminates, and lime, combining to form a stable runway surface for the airplane visible at the center. Images of a thermometer (symbolizing the chemical reaction involved) and a stopwatch (symbolizing the speed gained from the use of Dowflake) are superimposed over the compounds. Notably, the advertisement was produced during World War II and bears the Company's wartime tagline "Dow: Chemicals Indispensable to Industry and Victory."
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Dow Chemical Company. “Concrete Chemistry: Dowflake,” January 23, 1943. Advertisements from the Dow Chemical Historical Collection, Box 7. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/z316q221w.
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