This is the final Frit 644 test. This test was tumbled for 40 minutes and there’s just a tiny bit of frit on the screen. My friend Steve Gordon just takes this frit 644 and soaks it in hot water before he mixes it into his glaze. And he says that hot water works just fine to dissolve the clumps. However the broader question here is whether you could use this rock tumbler to make materials smaller, and the answer is yes. This little machine works very much like a ball mill, although it is going m