cans here go for .50 a pound. and the alum that I melted down would have been dirty anyways as it had steel rivits and pins in it. mine went to the yard as dirty cause it had charcoal in it from melting down into the bonfire, I wasn't doing with the goal of making an ingot, just to see if the bonfire was actually hot enough to melt alum. You wonder about those sort of things after a few rum and cokes lol.
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