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Old 03-31-2005, 08:18 AM
Tom Littleton Tom Littleton is offline
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Join Date: Apr 2002
Posts: 79
Tom Littleton is on a distinguished road

From Frank Woolley (data from a Melt at the Studio at Corning in 1997). Softening point 666 degrees centigrade(1231degrees F), Annealing point-492 degrees centigrade (918 degrees F), strain point-455 (851 degrees F), expansion (0-300 degrees) 94.9.

CAVEAT- None of these figures should be taken as gospel, a holy grail, something that everyone is going to get every time they melt. Variations in raw materials, frunaces, melting techniques and other factors will cause differences in the glass. Not to mention Frank told me that the dilatometer measurements were plus or minus one point in accuracy.

Have I put enough qualifiers in here yet?
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