Machine-translated by Google. Questions are authored in English.
Top

Discussion

Black coring in a fired clay product is caused by

  • A.using far too much water during the forming stage
  • B.carbon trapped in the centre that failed to burn out
  • C.the applied glaze reacting with the outer body surface
  • D.cooling the fired ware too quickly after firing

Answer: B

Organic matter in the interior cannot oxidise if the surface seals before the carbon has burnt away. A longer oxidation hold at moderate temperature is the usual remedy. The defect is invisible until the piece is broken across.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.