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Lab talk, the good, the bad, and the ugly
Porcelain
cracking porcelain on long span bridge
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<blockquote data-quote="charles007" data-source="post: 199388" data-attributes="member: 9"><p>How/what did you use to support the bridge on the firing tray ? pillow ?</p><p>Its going to take a long time for the pontics to cool, what was your slow cooling time and temp while still in the oven before taking out....</p><p>On this mass of metal I hope the porcelain to metal CTE's were no less than ideal........</p><p>Are you sure your porcelain is ok to use with the alloy ?.......... anything less than ideal and your going to see checking on the pontics...</p></blockquote><p></p>
[QUOTE="charles007, post: 199388, member: 9"] How/what did you use to support the bridge on the firing tray ? pillow ? Its going to take a long time for the pontics to cool, what was your slow cooling time and temp while still in the oven before taking out.... On this mass of metal I hope the porcelain to metal CTE's were no less than ideal........ Are you sure your porcelain is ok to use with the alloy ?.......... anything less than ideal and your going to see checking on the pontics... [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Porcelain
cracking porcelain on long span bridge
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