Stamp depicts Leo Hendrik Baekeland, a Belgian chemist who invented Bakelite (polyoxybenzylmethylenglycolanhydride) in 1907. Bakelite was an inexpensive, versatile, and popular plastic, which marked the beginning of the modern plastics industry.
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Van Noten, Jean. “Belgian Semipostal Stamp Commemorating Leo H. Baekeland.” Belgium, October 9, 1955. Witco Stamp Collection, Box 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/z890rt32g.
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