At 23:16 1999-01-10 +1000, Paul B Webster wrote:

>> As you know lead is poison and vaporizing lead can make it more
>> available so you don't want to over heat lead.
>
>  So, don't solder using oxy-acetylene or an arc torch.  You won't
>however vaporise the lead with a soldering iron, so don't get too upset
>about this aspect.

I am sorry to doubt that.  
We will not boil it but can we be sure it does not vapourize?
Any other material I know of vaporizes a little as soon as it goes liquid.
It just differs in at what rate.

---

Tip for fume filter:  I have since many years used a home-built extraction
system i in tegrated in my heat controlled soldering iron.  
I have tried several filters, but still got some problems with the valves
in the pump.  I then thougt: most compounds are either solvable in vater,
or in oil!  

Now for two years i have successfully used a bubble filter:
A large glass container, four litre (a gallon), high form (used cucumber
conserve), where I let the pipe from soldering iron end in the bottom with
a lot of very small holes (0.3 mm) drilled along a loop of the tube.
The pump (recovered from an old gas analyzer) is mounted in the outdoor
garage ceiling and is connected to container top.  The container is filled
with 1/4 water and 1/2 vegetable oil (raps oil). (top 1/4 empty / just air).

The very most fumes appears to get solved in the oil, making it white and
creamy, and maybe some in the water.

The bubbleing is also pretty decorative  :)

Also the filter is easy to destruct, I just don�t know how to classify it
for destruction: DO it contain lead, or can I just burn the oil?

/Morgan
        Morgan Olsson                   ph  +46(0)414 70741
        MORGANS REGLERTEKNIK            fax +46(0)414 70331
        H�LLEK�S           (in A-Z letters: "HALLEKAS")
        SE-277 35 KIVIK, SWEDEN               mrt@iname.com
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