Can anyone tell me why I’m getting grooves in my molds? And how to fix them?
There are lines and grooves where I can see the different layers of packing/rubber. I can see in both the mold and the wax model.
In particular, I have a size 11, square, wide band ring I am trying to make into a successful mold. Twice I have used Castaldo Gold, 7 layers. I took time to cut pieces to make sure the pack is tight. Both times I put in vulcanizer at 307 degrees (as close as possible with readout markers of 300, 325, 350… The first on for 50 minutes, the 2nd 55 minutes, thinking it didn’t get hot enough.
Any suggestions? Info?