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Scientists identify secret ingredient in Leonardo da Vinci paintings
Jacopo Prisco, CNN “Old Masters” such as Leonardo da Vinci, Sandro Botticelli and Rembrandt may have used proteins, especially egg yolk, in their oil paintings, according to a new study. Trace quantities of protein residue have long been detected in classic oil paintings, though they were often ascribed to contamination. A new study published Tuesday
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