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A ceramic glaze is essentially

  • A.a thin layer of glass fused to the body
  • B.a paint applied after the ware is fired
  • C.a second layer of the same clay body
  • D.a metal coating deposited from vapour

Answer: A

It is melted onto the surface during firing and solidifies as a glass, sealing the porosity and giving the finish. Because it is a glass rather than a coating, it must be matched to the body it sits on. Expansion mismatch is the source of most glaze faults.

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