Minimum: 2 mm

Ideal: 3–6 mm

Maximum: 10 mm

Small walls and features may work under 2 mm

Fillet internal edges to avoid stress concentrations and decrease cracking:

Minimum: 1 mm fillet radius

Ideal: 2 mm or more

During firing, parts shrink more along the printed Z axis than the XY axis due to the lower concentration of ceramic particles between layers. If a model is printed at an angle, this causes a skewing effect when fired. To correct the effect of uneven shrinking, pre-scale the model using the Z-Scale Factor tool in PreForm. The part shape will correct during firing.

Shrinkage is caused by sintering and gives Ceramic Resin V1 its strength by increasing the density of the part. General shrinkage occurs uniformly across the part, and parts shrink by approximately 15% during sintering. After setting the Z-Scale Factor use the Size tool in PreForm to set the Scale to 1.15 to account for shrinkage.

Ceramic particles can move during sintering, which means the shape of the model is affected by gravity. Self-supporting structures maintain their shape, but unsupported overhangs tend to slump or collapse. Design structures that are self-supporting to minimize the volume of support structures and to prevent slumping during firing.

Unsupported structures, such as overhangs and bridges, are often unavoidable. There are two major ways to control the potential slumping effect: Print custom setters. Setters should be designed and oriented to shrink in the same direction as the part. Fire on supports.