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If you’ve ever wanted to experiment with low-melting-point metal alloys, for casting toy soldiers or other purposes, Rotometals, Inc is a great online resource. Their Low-Melting-Point Bismuth Based Ingot 158-190-ALLOY, for instance, can be melted in a pot of boiling water. If you’re concerned about lead or cadmium toxicity, their slightly-higher-melting 281-ALLOY contains only bismuth and tin. The also carry pure bismuth, indium, magnesium, and other metals and casting supplies in convenient quantities for small users.

Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and makezine.com. My work has also appeared in ReadyMade, c’t – Magazin für Computertechnik, and The Wall Street Journal.


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