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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
Dialing in pressing oven.
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<blockquote data-quote="John C" data-source="post: 236633" data-attributes="member: 13961"><p>So I have a couple complete presses now. My post above says successful but that is kind of an exaggeration. The margins were complete, the first one came out ok. The second one had some pitting, was missing a corner from the incisal edge and what I would call a crater( way bigger than a pit and shaped like a bomb crater). There really didn't look like much reaction layer but I'm wondering if I went too hot. I went from 930 celcius with incomplete presses up to 938 celcius, which seemed to help. I'm using the E-liminator investment which works good to minimize reaction layer. Should I try 935 celcius and see how it goes?</p></blockquote><p></p>
[QUOTE="John C, post: 236633, member: 13961"] So I have a couple complete presses now. My post above says successful but that is kind of an exaggeration. The margins were complete, the first one came out ok. The second one had some pitting, was missing a corner from the incisal edge and what I would call a crater( way bigger than a pit and shaped like a bomb crater). There really didn't look like much reaction layer but I'm wondering if I went too hot. I went from 930 celcius with incomplete presses up to 938 celcius, which seemed to help. I'm using the E-liminator investment which works good to minimize reaction layer. Should I try 935 celcius and see how it goes? [/QUOTE]
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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
Dialing in pressing oven.
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