Firescale

Firescale

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Description

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Firescale, also known as firestain, is a red or purple stain that appears on mixtures of silver and copper, such as sterling silver. At high temperatures, oxygen mixes with the copper to form cuprous oxide and then cupric oxide. Attempts to reduce this problem usually involve replacing oxygen with another gas such as hydrogen or ammonia. With a very high copper content, this may appear on gold mixtures. A fire scale is a layer of oxides that forms on the surface of metal when a blacksmith heats a tool.show more

Product details

  • Paperback | 188 pages
  • 152 x 229 x 11mm | 281g
  • Fer Publishing
  • Saarbrucken, Germany
  • English
  • black & white illustrations
  • 6136775395
  • 9786136775395