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adamb4321
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I switched to Noritake EX3 maybe 6 months ago, I keep getting a recurring bubble problem that can range from very minor to bloody major.
I've been through all of our processes and tightened up on our sandblasting blasting and opaquing procedures which has helped but not eliminated the problem.
The porcelain looks good when fired with nice clarity/translucency but after glazing has either micro porosity or big surface bubbles, crowns that have had additions are affected the most.
I keep thinking it's under fired and that's what is causing the problem (I've already increased the firing temps about 20'c over the Noritake recommendation) but it looks like its fired properly.
What temps/parameters are you all using (furnace is a Zubler) for Noritake and do you think the suggested firing temp for additions is to low or ok?
I've been through all of our processes and tightened up on our sandblasting blasting and opaquing procedures which has helped but not eliminated the problem.
The porcelain looks good when fired with nice clarity/translucency but after glazing has either micro porosity or big surface bubbles, crowns that have had additions are affected the most.
I keep thinking it's under fired and that's what is causing the problem (I've already increased the firing temps about 20'c over the Noritake recommendation) but it looks like its fired properly.
What temps/parameters are you all using (furnace is a Zubler) for Noritake and do you think the suggested firing temp for additions is to low or ok?