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Reduction firing is used in traditional ceramics chiefly to

  • A.develop particular glaze and body colours
  • B.raise the peak temperature reached in the kiln
  • C.shorten the overall length of the firing cycle
  • D.remove the need for any kiln furniture at all

Answer: A

Iron and copper compounds take quite different colours depending on their oxidation state, which is the basis of celadon and copper red glazes. The atmosphere is controlled by restricting air rather than by adding anything.

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