The Case of the Missing Ring
Advertisement for Dow Chemicals
- 1951
Color print advertisement for ion exchange resins manufactured and sold by the Dow Chemical Company for water purification and other uses. The advertisement depicts a mother and son peering into a bathtub. The accompanying text details how Dow ion exchange resins are used to soften water and thus eliminate "the ring around the bathtub" caused by hard water.
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Cite as
Dow Chemical Company. “The Case of the Missing Ring,” 1951. Advertisements from the Dow Chemical Historical Collection, Box 8. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/n04lxne.
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