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 06:45:41 GMT
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Viewed:
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5076 times
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In lugnet.parts.mod, David Laswell wrote:
> In lugnet.parts.mod, Sonnich Jensen wrote:
> > Look at my page under Modifications
> > http://my.tele2.ee/sonnich/lego/
> > or go direktly there by this link:
> > http://my.tele2.ee/sonnich/lego/modify01.htm
>
> Bismuth, huh? Well, it's the next heavier element after lead, decays so
> slowly that it might as well not be radioactive (half-life of 19*10^18
> years), is the only non-toxic heavy metal (aside from the radioactivity, but
> you probably get that much radiation standing under direct sunlight) and
> combines easily with lead/tin/iron/cadmium...but its melting point is
> 520.52F, which is well higher than the point where ABS will have melted to a
> smoldering heap of slag. You're probably using a tin/bismuth alloy with a
> pinch of lead. I ran across one <http://www.rotometals.com/fusible.htm
> supplier> who has a bismuth alloy that actually melts at 158F (70C). Geez,
> you could melt that stuff in a hot-pot double-boiler (not something that
> you're likely to find for sale, but I did build one for customizing action
> figures).
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 being played with )
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.
A friend of mine uses it on his factory, where I used a gas burner to melt it,
and a small "spoon".
Hope this explains.
Sonnich
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Message has 1 Reply:
 | | Re: Home made weight bricks and train base plates
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| (...) 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. (...) (...) (20 years ago, 17-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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| (...) that it might as well not be radioactive (half-life of 19*10^18 years), is the only non-toxic heavy metal (aside from the radioactivity, but you probably get that much radiation standing under direct sunlight) and combines easily with (...) (20 years ago, 13-Aug-04, to lugnet.parts.mod, FTX)
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