"Arfa Daily" wrote in message
...

"Stephen Cowell" wrote in message
. net...

"Arfa Daily" wrote in message
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"Dave Moore" wrote in message
news:W7vHh.3913$B7.2859@bigfe9...

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Anyway, finally, it dawned on me that perhaps
30 years involved in electronics with a good
20 of them heavily involved in prototyping guitar
amp designs, might have taken it's toll. So I did some
research online and discovered that indeed my symptoms
just might well be those of lead poisoning.

...

Lead as a metal does not fume at soldering temperatures, such that it
can
be ingested in that way. The fumes and vapour that you see when
soldering, are from the flux contained in the solder, burning away.
There
is some evidence that prolongued exposure to the rosin based fluxes
used
to date, can cause respiratory tract ailments such as industrial
asthma,
and may in extreme circumstances be carcinogenic.

Rosin has Zinc Chloride in it... I've been poisoned with
zinc before (welding) and you need to drink milk for
the chelating calcium in it. Bad sick headache... not sure
of prolonged low-level exposure, but fume hoods are nice.
__
Steve
.

That's a new one on me. I had always understood rosin to be a fairly
benign
material - at least when not heated up - made from naturally occuring pine
resin. Is the zinc chloride something that has been added in to make the
rosin suitable for some specific purpose ?

Arfa



Zinc Chloride is used in plumbers flux, ie Acid flux paste. Not something
you want on or near electronics, even wires for that matter.