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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
eMax Internal Fit (White Powder)
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<blockquote data-quote="MushMaster" data-source="post: 337595" data-attributes="member: 22756"><p>Good day all,</p><p></p><p>Running into some pressed lithium disilicate issues lately and cannot quite put my finger on it.</p><p>Always made a DuraLay cap on which the wax design is made, invest, burnout, press, remove some reaction layer and beauty; both the press and the fit. Lately however, we noticed that the margins are not always fully complete and the internal area has gotten a white-ish layer that when removed with a diamond, comes out in the form of a white powder. This consequently also influences the internal fit and results in the decision to redo the case.</p><p></p><p>In the process of elimination we came up with the wax. We reverted back to a wax that used to be a success and it does not solve the issue. We have started using less separation liquid, thinking it would react with the investment material. Furnace is calibrated. Liquid is fresh. We are now going to try a few sample pieces and try a GC ingot instead of eMax to see if that makes a difference, because at this point we do nothing different from when it was not a problem.</p><p></p><p>Perhaps you have had the same issue and found the culprit, if so I would love to hear about it. Any ideas are welcome and if you want more information, I will get you the info and update this (first) post accordingly.</p><p></p><p>Thanks!</p></blockquote><p></p>
[QUOTE="MushMaster, post: 337595, member: 22756"] Good day all, Running into some pressed lithium disilicate issues lately and cannot quite put my finger on it. Always made a DuraLay cap on which the wax design is made, invest, burnout, press, remove some reaction layer and beauty; both the press and the fit. Lately however, we noticed that the margins are not always fully complete and the internal area has gotten a white-ish layer that when removed with a diamond, comes out in the form of a white powder. This consequently also influences the internal fit and results in the decision to redo the case. In the process of elimination we came up with the wax. We reverted back to a wax that used to be a success and it does not solve the issue. We have started using less separation liquid, thinking it would react with the investment material. Furnace is calibrated. Liquid is fresh. We are now going to try a few sample pieces and try a GC ingot instead of eMax to see if that makes a difference, because at this point we do nothing different from when it was not a problem. Perhaps you have had the same issue and found the culprit, if so I would love to hear about it. Any ideas are welcome and if you want more information, I will get you the info and update this (first) post accordingly. Thanks! [/QUOTE]
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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
eMax Internal Fit (White Powder)
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