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Pugging of a plastic ceramic body serves to

  • A.raise its temperature before the forming stage
  • B.reduce its water content quite substantially
  • C.add the glaze to the outer surface of it
  • D.mix it uniformly and remove entrapped air

Answer: D

Correct answer: mix it uniformly and remove entrapped air

A pug mill works the body under vacuum, so it homogenises the water content and the composition and draws out the air. Both are needed: an uneven body extrudes unevenly, and trapped air becomes a void that expands and splits the piece later.

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