Subject:
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RE: Lead warning for people who solder & eyeball project idea
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 26 Nov 1999 22:07:59 GMT
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Original-From:
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Mark Geddes <mark@AudeSi.com>
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Viewed:
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724 times
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Lead comment: (move down a few lines to see actual Lego stuff).
I couldn't agree more (about the cigarettes). I just thought I'd
mention them because a workplace hazard specialist once told me that they
found high lead levels in a group of welders they tested, and significantly
higher levels in the ones who also smoked.
We used to work with tubes in our ancient electronics class ;-). A
lot of the prototyping fixtures were massive corroded old clips, that
couldn't be soldered to without using acid core flux. Today it's mainly used
in plumbing.
The chances of getting lead "poison" from solder may be minimum, but
the amount of lead that remains in your body from soldering is measurable.
And once it's in your bones, it's there for good. It's sort of like smoking,
some people will die young, while others live to be 100. How much poison is
acceptable to you?
I'm one of the old solder sucking, mercury filling, asbestos school,
parents both smoked technologists, and I'm still around ... cough ;-)
I didn't mean to start a big debate on a Lego forum. I actually was
messing with my email program & wanted to see if it would re-direct my Lego
mail into a separate folder.
Lego stuff:
On an actual Lego topic - I've been thinking about a heat tracker
"eyeball". My first version will probably be a "light" tracker, because
it'll be a lot easier to get the movement down, using photocells & a
flashlight, but ultimately I'd like to be able to track a warm body moving
around a room.
Mark Geddes
snip...
> most people poison themselves by
> > not thoroughly washing after soldering and then they ingest it by either
> > touching their food, or cigarettes.
I find it interesting that you are worried about ingesting lead that
has
rubbed off fingers and onto cigarettes. I'd worry about all the crap
in
the cigarette first :-)
> The acid core solder (nobody is using this, right?) is corrosive to the
> board
> and components, so be sure to wash the board thouroughly. The newer
> no-clean
> fluxes emit very corrosive fumes, so be sure to use them in a well
> ventilated
> area. DON'T hang your head over the project and inhale the fumes... DUH!
>
>
[ Indium solder if you can deal with the higher melting point. The actual
danger from lead based rosin core solder is minimum. It's pretty tightly
bound to the tin forming a eutectic. The history of professional
electronics technicians and engineers getting lead poising is minimum and
it's very common for them to hold short pieces in their mouth while
handling components. ]
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