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Ram pressing forms a piece by

  • A.forcing a slip into a plaster mould under pressure
  • B.extruding a column through a shaped die
  • C.spraying granules into an open mould
  • D.squeezing plastic body between two porous dies

Answer: D

Porous dies allow air to be drawn through to release the piece, and the method suits shapes with some relief. It occupies a middle ground between jiggering and pressing in both cost and capability. It suits shapes with relief that extrusion cannot produce.

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