Word: ferroni
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Dates: during 1970-1979
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Tiny bumps rose and flaked the paint away, speck by speck. Veteran Restorer Dino Dini, 61, called in a chemist from the University of Florence named Enzo Ferroni, who discovered that the crystal growth was caused by lime, or calcium carbonate, turning into calcium sulphate. It took a year to find an ammonia solution that would turn the crystals back into calcium carbonate again. Impregnating a postcard-size sheet of Japanese rice paper with the solution and backing the paper with wood pulp, Dini and an assistant pressed each little rice-paper block for five minutes on the surface...