"Researchers have deciphered enigmatic recipes for metal-making contained in an ancient Chinese text, revealing unexpected complexity in the art at the time.
Six chemical formulas are given in a Chinese text from 300BC known as the Kaogong ji. The manuscript, known as The World’s Oldest Encyclopedia of Technologies, forms part of a detailed archive of early imperial rule, which archeologists have been trying to decode since the 1920s."
For the full article, please see: https://www.theguardian.com/world/2022/aug/10/metal-making-recipes-ancie...