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State whether the following is true or false.
Black coring can be corrected by firing to a higher peak temperature.

  • A.True only at large scales
  • B.False only at small scales
  • C.True
  • D.False

Answer: D

A higher peak seals the body sooner and makes matters worse, since the carbon is trapped earlier. The remedy is a longer oxidising hold at a lower temperature before vitrification begins. Firing hotter closes the surface sooner and traps more carbon.

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