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The thickness of an applied glaze layer is controlled chiefly by

  • A.the colour of the pigment that is being used
  • B.the specific gravity of the slop and the dwell time
  • C.the temperature that is reached in the kiln during firing
  • D.the alumina content specified in the glaze recipe

Answer: B

Correct answer: the specific gravity of the slop and the dwell time

Thickness is set at application: the specific gravity of the suspension controls how much solid is in it, and the dwell time controls how long the porous biscuit draws water and deposits solids from it. Both are measured and controlled routinely, since thickness affects colour, opacity and the tendency to craze or crawl.

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