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- From: schuch@phx.mcd.mot.com (John Schuch)
- Subject: Re: Is lead solder bad for me?
- Message-ID: <1992Nov19.135438.6979@phx.mcd.mot.com>
- Sender: news@phx.mcd.mot.com
- Nntp-Posting-Host: bopper2.phx.mcd.mot.com
- Organization: Motorola Computer Group, Tempe, Az.
- References: <1992Nov17.175550.14583@netcom.com>
- Date: Thu, 19 Nov 1992 13:54:38 GMT
- Lines: 56
-
- In article <1992Nov17.175550.14583@netcom.com> kehoe@netcom.com (Thomas David Kehoe) writes:
- >Will I get lead poisoning from breathing the smoke
- >from solder? I work next to an open window, and leave
- >the soldering iron on the window sill, but when I'm
- >doing close soldering work, I can't avoid breathing
- >the smoke form the solder.
- >
-
- You can, but you probably will not. Lead poisoning pretty much depends
- on the quantity of exposure vs. the length of time. Burning the paint
- off of a house implies large exposure in a short time. Hobbiest soldering
- on the otherhand is usually infrequent.
-
- Now, if you are the type of person who worries about such things, here
- are the "proper" precautions for soldering.
-
- -Work only in a well ventilated area.
- -The work surface should have forced ventilation drawing or blowing
- fumes away from the person soldering and delivering the fumes
- outside or to a proper filter (sub-micron + charcoal).
- -The work surface should be of a non-flamable, non-meltable material.
- -Do not eat, drink or smoke while soldering.
- -Wear safety glasses whenever the iron is hot.
- -Keep solder away from eyes and mouth at all times.
- -Wash hands thouroughly after holding any solder product.
-
- Do I do this? Well, I have a little muffin fan to clear the smoke and
- I do wash my hands after soldering. I'm not real concerned, but then
- my employer draws blood (literally) for a lead test every 3 months.
-
- >I've switched to lead-free solder, which is 97% tin and
- >3% silver (available at Radio Shack). The label still
- >says to avoid breathing the smoke. Why doesn't everyone
- >use th
-
- The smoke from soldering comes from burning the flux inside the solder,
- not from the molten metal. The lead hazard is from particulates, or dust
- which can be made if the solder boils, or steam is released. The other
- hazard is from the oxides which form on the surface of the solder and
- can transfer from the solder to your hands and skin and then be moved
- to your mouth.
-
- Industrial users of solder need to consider a wide range of things
- while selecting solder formulations, such as, melt point, wettability
- to various other metals, flux interaction, joint strength, etc, etc.
- A hobbiest on the other hand probably does not care. I would, however,
- think that 97%tin solder would be fairly brittle at low temperatures,
- but that's a guess.
-
- John
-
- --
- | ONE LINE NOVEL: She backed away from the corpse slowly, not so much out |
- | of fear, but simply unsure of what the crowd expected her to do with it. |
- +--------------------------------------------------------------------------+
- | John R. Schuch - Motorola Computer Group - Manufacturing Engineering |
-