I’d been using a fan to blow on the mold for temp control once up and running hot. I’ve also used a wet rag and set the mold on that, but it required constant water application and was a hassle. But recently I started just sitting the mold on the granite surface of my casting bench and noticed that it kinda sucked some of the heat out of the mold in a way that also left the spruce plate with some of the heat. So that gave me an idea to use a thick 3/4” chunk of steel plate instead and WOW does it work amazing! Way better than the fan or the wet rag technique. Sucks the heat out quicker than I’d expect, and stays consistent. Anyway, not sure why I didn’t think to try this before, I guess I didn’t think it would work this well.
SO, my casting setup got a little better and I thought I’d share my findings.