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Cullet is added to a glass batch mainly because it

  • A.colours the finished glass green
  • B.melts more readily than raw batch
  • C.raises the softening point of the finished glass
  • D.acts as a fining agent in the melt

Answer: B

It has already been through the melting reactions, so it needs only to be brought to temperature. High cullet ratios are limited by colour mixing and by contamination in the recycled stream. Green and clear cullet cannot be mixed freely.

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