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3D3DLead-free solder.
This is a different brand of lead-free solder which is a good bit cheaper than tin/silver solder. It melts at about the same temperature (419F) and claims to be stronger. The package does not list what the composition is other than to say there is absolutely no lead in it: I'll test it by XRF when I get a chance. This stuff makes a fine casting metal.
Source: Hardware Store
Contributor: Theodore Gray
Acquired: 24 July, 2003
Price: $6
Size: 2.5"
Purity: >90%