egyptian blue pigment recreated

A team led by Washington State University has successfully recreated Egyptian Blue, the oldest manufactured pigment in history, which was first synthesized in ancient Egypt and used in funerary rituals and Roman art. The production process was lost during the Renaissance. Working with the Smithsonian’s Museum Conservation Institute and the Carnegie Museum of Natural History, the researchers developed 12 recipes using silicon dioxide, copper, calcium, and sodium carbonate, heating them at around 1,000 degrees Celsius for up to 11 hours to mimic ancient methods. They discovered that only half the expected amount of blue-producing compounds was needed to achieve the exact chemical match.