Subject:
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Re: Home made weight bricks and train base plates
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Newsgroups:
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lugnet.parts.mod
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Date:
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Tue, 17 Aug 2004 16:32:02 GMT
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Viewed:
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4682 times
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In lugnet.parts.mod, Sonnich Jensen wrote:
> I know there is tin in it, but lead - dont know.
Lead is usually added in a very small amount to make it flow into fine detail
better. It's probably only a few percent lead content, so handling it wouldn't
bear anywhere near the same risk of lead poisoning that handling pure lead does.
> Its melting point should be a little above 100C. A friend of mine tells,
> that there should not be Cadmium in it, as Cadmium is toxic.
It is (so is lead), but it's still used for a variety of things. If you've ever
shopped for good art paints, you'll notice that a few of them use toxic
chemicals for vibrant pigments, and cadmium is used for certain shades of green,
yellow, orange, and red), especially if you start getting into aniline dyes.
Cadmium is probably never used in white metal, though, because the idea was to
make it less toxic than a metal with high lead content.
> I havent used this for some time, but I recall, that when I added it, I had
> to do it fast, otherwise it becomes to cold, and it is no longer possible to
> work with it.
You could cheat the work time by heating the brick up in boiling water, but make
sure you don't heat it much beyond the boiling point or it might deform. Also,
that supplier that I linked to had a mixture that melts well below the boiling
point, so you could heat that up in a double boiler and it'd be well above its
melting point when you pour it in, so it should stay liquid quite a bit longer.
You might even be able to remelt it in boiling water to let the metal settle out
a bit more.
> A friend of mine uses it on his factory, where I used a gas burner to melt
> it, and a small "spoon".
Sounds like you're going for the low-cost solution, but you'd get better control
over your pour if you bought a small crucible.
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Message has 1 Reply:
 | | Re: Home made weight bricks and train base plates
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| (...) Yes, always wash your hands after handling solder! (...) I see the melting point of standard solder (63% tin, 37% lead) is 183 deg C. If I held a soldering iron and a reel of solder over an invered brick and dripped molten solder into the (...) (20 years ago, 18-Aug-04, to lugnet.parts.mod)
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Message is in Reply To:
| | Re: Home made weight bricks and train base plates
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| (...) I know there is tin in it, but lead - dont know. Its melting point should be a little above 100C. A friend of mine tells, that there should not be Cadmium in it, as Cadmium is toxic. (In our case they would probably end in a model rather than (...) (20 years ago, 17-Aug-04, to lugnet.parts.mod)
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