Does anybody have any information as to how dimensionally stable the
models are ? I consider creating a piston, which has to seal with an o-ring.
If the material shrinks (or expands) over time or with temperature
I would like to know.
I read one PDF but it seemed primairly about health and safety aspects.
Shrinkage is common when injection molding because of the heat and pressure used in the process. However, 3D printing has much lower stress on the material. Temperatures are localized and pressure is kept at room levels.