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Quartz inversion at about 573 degrees requires care during firing because

  • A.all the binder decomposes at exactly 573
  • B.the sudden volume change can crack the ware
  • C.the body melts completely at that point
  • D.the glaze begins to boil at that temperature

Answer: B

The change from alpha to beta quartz is rapid and reversible and involves a volume change of about one per cent. Both heating and cooling are slowed through the range, and the cooling passage is the more dangerous of the two.

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