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|    rec.crafts.metalworking    |    Metal working and metallurgy    |    215,319 messages    |
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|    Message 214,879 of 215,319    |
|    Snag to Jim Wilkins    |
|    Re: Lead pots    |
|    15 Oct 25 06:31:46    |
      From: Snag_one@msn.com              On 10/15/2025 6:05 AM, Jim Wilkins wrote:       > "Snag" wrote in message news:10cn56c$32g7v$1@dont-email.me...       >       > On 10/14/2025 6:05 PM, Jim Wilkins wrote:       >       > ... My temp probes are metal tubes ... I've had one of then over 2000       > degrees in my gas forge . I've used them to check melt temp of molten       > aluminum just before pouring into molds too . Lead temps are not a big       > deal ...unless you leave a trace of moisture in an open top ingot mold .       > Got a couple of scars from that adventure !       > Snag       > --------------------------------       >       > When I was young and had only woodworking machinery I cast lead salvaged       > from broken discarded batteries in wood ingot molds routed on the       > Shopsmith in vertical knee mill mode. The wood slowly charred and       > degraded and a plaster coating didn't hold up either so I had the bright       > idea of trying to cast under water since I knew molten copper poured       > into water would insulate itself in a stable steam bubble and briefly       > remain glowing.       >       > Lead also quietly filled a flooded mold cavity and hardened with a shiny       > unoxidized surface. I thought I was onto something until I poured into a       > cavity with a dimple in the bottom, an old nail hole that the lead       > flowed over. The resulting steam explosion plated the ceiling with a       > thin shiny layer. Luckily I wasn't in its path. After that close call I       > became more careful.       >       > Molten aluminum dribbled into a snowbank freezes into shiny teardrops       > with pointed tails.       >       > https://en.wikipedia.org/wiki/Prince_Rupert%27s_drop       >               And molten aluminum poured into ant or yellowjacket nests forms some       awesome sculptures .       --       Snag        I appreciated foreign cultures more       when they stayed foreign ...              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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