By reviving a century-old patent for blue paint, this architect reflects on a powerful, lesser-told history
By Jacqui Palumbo, CNN (CNN) — A century ago, the scientist and inventor George Washington Carver filed two patents related to his new method for making paints and stains from Alabama’s clay. He had discovered the iron-rich soil could be used in a chemical reaction with a potassium compound and nitric acid to produce a
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