When we last saw the mold for this project, it had just come out of the oven, firm but squishy in the middle. At this point I still needed to carve a sprue so I could pour the metal in. If I had done this when the dough was still wet, it probably would have worked fine. If I had waited until everything was bone dry, it probably would have worked fine. Instead, I had a dry shell with a doughy inside, which was not at all inclined to cut smoothly. I tore out a vaguely funnel shaped chunk and hoped for the best. Things were not looking good for the home team. The inside of the sprue looked awfully moist still, and I knew that moisture and hot metal did not go well together. How would I dry things out in there? Propane torch? Sure, why not?
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Mirrored from Lorenzo's Workshop.