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Bubbles

1. Gaseous inclusions in glass: can be minute and widely dispersed or larger due to agglomeritisation (joining together).
2. Eruptions in sheet glass during a fuse firing, due to expansion of air trapped between the sheets.
3. Eruptions in sheet glass during a slump firing, due to expansion of air trapped between the sheet and the bedding powder or to gasification of bedding material.
 

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Peter Riley, a Victorian based kiln maker, with over fifty years of experience in related industries.
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Celsius

Symbol C. Temperature measurement scale in which zero degrees represents the freezing point of water and 100 degrees the boiling point.

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