no, make sure your copings have sufficient build up and that you are getting a good solid bake in the central groove/fossa on a seperate bake before building up the crown
TheLabGuys right. Even Ivoclar tech reps just feed me the same info thats in the literature. cut the central groove down to the liner and let it rip. Oh yeah and "well if you use our zirconia, blah, blah, blah"
I feel you Toast, I vibrate porcelian into the void and upon refining the anatomy...
thanks folks
Yes I used the zirliner, The slifting occurs between the liner and body, Yes I have tried a prelimary wash of body. I have left the zirliner alone and I have blasted it before the wash. I have done body only bakes and filled in when I stack incisal. Looks like repeated firings is...
Gypsum Bond Investment
If your looking to try a different investment try a gypsum bound like Beauty Cast and use the hydroscopic technique. You'll get a dense casting with exceptional surface texture. Breaks out looking like it's been blasted with glass beads. Can't beat old school.