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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
Sprue Guage
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<blockquote data-quote="JohnWilson" data-source="post: 15788" data-attributes="member: 213"><p>I agree, I just had a few of my techs come in here so I could show them these picture. They are all snake bit as we have had several large ring investments fail lately. We use Formula one for everything but lately having some issues with the larger rings with lots of glass. We are doing everything by the book, measuring everything patterns perfectly placed perfect sprue angels you get my drift. I am not having any issues with the investment for small rings or any metal ceramic or cast gold restoration. I have tried to rule out a bad batch of liquid/investment but having it work with everything else is confusing. It might just be a fluke but I think I will order a box of Ivoclars slow investment on Monday and test it out again.</p><p></p><p></p><p>Al you still only using Ivoclars slow investment.? What size ring are you using these days? 200gram or are you doing 300's</p><p></p><p>Do you use the Invex liquid or are you grinding the small reaction layer off?</p><p></p><p>Has ingot dollars spent monthly exceeded alloy for you? This last month was the first month we did more all ceramic restoration than metal/ceramics. Sadly with the spike in alloy prices my alloy bill was about the same.</p><p></p><p>Have a great weekend,</p></blockquote><p></p>
[QUOTE="JohnWilson, post: 15788, member: 213"] I agree, I just had a few of my techs come in here so I could show them these picture. They are all snake bit as we have had several large ring investments fail lately. We use Formula one for everything but lately having some issues with the larger rings with lots of glass. We are doing everything by the book, measuring everything patterns perfectly placed perfect sprue angels you get my drift. I am not having any issues with the investment for small rings or any metal ceramic or cast gold restoration. I have tried to rule out a bad batch of liquid/investment but having it work with everything else is confusing. It might just be a fluke but I think I will order a box of Ivoclars slow investment on Monday and test it out again. Al you still only using Ivoclars slow investment.? What size ring are you using these days? 200gram or are you doing 300's Do you use the Invex liquid or are you grinding the small reaction layer off? Has ingot dollars spent monthly exceeded alloy for you? This last month was the first month we did more all ceramic restoration than metal/ceramics. Sadly with the spike in alloy prices my alloy bill was about the same. Have a great weekend, [/QUOTE]
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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
Sprue Guage
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