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Old 2013-01-18, 2:45pm
Alaska Alaska is offline
Alaska Boro
 
Join Date: Dec 10, 2009
Location: Anchorage, Alaska
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This is a well covered subject on LE. Give search a try and see what you come up with.

However, chapter 8 in "Contemporary Lampworking" provides a nice set of charts for both COE 104 and 33 glass. Plus an excellent discussion about the annealing process. A recommended book for all lampworkers.
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