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The lead bath is a very good method of heat treatment, meaning hardening of the steel. They have to quench the blade in something after heating it to "set" the martensite formation at the edge at...

I'm going along with the info you guys are telling me. It's interesting to "look into" their processes though. Are there TI references for me to look at? It might not be all that interesting to...

I suspect historically that it was both. Lead was a pretty well known compound since the Roman era, very easy to work and work with. The plus side, they had no idea of its health hazards as we do...

Gentlemen, allow me a moment. The melting temperature of lead is 600 F/327.5 C. The temperature of 850 C/1560 F would be an acceptable heat treatment temperature but far too high for a tempering...