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Crystal, however, also has lead oxide, barium oxide, zinc oxide, or potassium oxide added.—Heather Bien, Southern Living, 29 July 2024 Leonardo is thought to have dissolved lead oxide powder, which has an orange color, in linseed or walnut oil by heating the mixture to make a thicker, faster-drying paste.—John Leicester, Fortune, 11 Oct. 2023 Researchers think Leonardo mixed lead oxide powder with either walnut or linseed oil.—Sarah Kuta, Smithsonian Magazine, 13 Oct. 2023 These last two compounds, the lead chlorides, are not naturally found in Egypt, which points to the possibility of deliberate manufacturing using lead oxide (PbO), rock salt (NaCl), natron (Na2Co3 and NaHCo3), and water.—Rebecca Kreston, Discover Magazine, 21 Apr. 2012 There are 42 chemicals which have been identified and are listed in Exhibit A, including common chemicals such as chlorine, methane, benzene, lead oxide, nickel, and cobalt.—Lynn Mucenski Keck, Forbes, 25 July 2022
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