My feldspathic porcelain gets crack after glazing

[Aditia KT]

View attachment 38942
Hello guys, do you know why my feldspathic very often gets crack after cooled ? Usually appears fter glazing and when it cooled the crack start appears ?
What i have to do ?

 

[Dentalmike]

Slow cool if you’re using base metal.
check that your porcelain isn’t mixing with a different non compatible ceramic on a wet plate or accidentally using a wrong bottle of powder likewise for your substructure.

these would be the easiest first things I would check.

 

[Car 54]

The refractory material is the wrong co-efficient for that porc, also the other way around.
Try a different refractory, some come in high expansion and regular expansion formulas.

Gresco Products - Dental Supplies

We are a dental lab supplier and manufacturer located in the Houston, Texas area. Products available include die stone and gypsum products as well as porcelain etching gel, dowels pins, and other supplies.

www.grescoproducts.com

You can also try slow cooling if your not doing that, or if you are, try fast.
Platinum foil veneers would take care of those concerns as far as cracking.

 

[Affinity]

2 words: Lithium discillicate.