Hey Franz!
Wauw ultrasonic ISO bath! Printing in formlabs new material, which needs no post curing and actually have bit of wax includede aswell in it, giving it some enhanced properties!
Using following material and washer
Still in doubt for how long i should let my investment sit… Made this thread a while back.
- Just had cracks in my mould and got following advise from a veteran.
“The main reason your investment cracked was because you let it stand to dry for to long and then compounded the problem by heating at too higher temperature. What happens is the outside of the investment dries first when it is allowed to stand for a long time in air. When the outside dries it seals the outside surface of the investment. This then traps the moisture inside. When the heat comes on, the water inside is turned to steam and the steam cannot escape. The pressure of the steam cracks the mould. Only allow the investment to reach its green strength about two hours and then start heating. This is where the 150°C is important and it should be done for several hours. It draws the moisture out slowly from the middle of the flask without sealing the exterior surface. I think the roughness of you casting is also caused by the water boiling inside the mould and roughening the surface of the investment.”