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I agree with Melissa, the water ratio maybe too high. Dental die stone won't crumble unless the mixing ratio is way off, mixing procedure is not correct, or the stone is not being properly stored. I would also check how long the stone sets.When I did models long ago I poured them the night before and in the morning I would have great detail and strong first pours to work with.
Posted to Our dies seem to be getting quite beat up lately. Not sure if it is the stone or I need different hardener. January 28, 2014