On 2001-07-11 22:18, Chuck_Clark wrote:
In all seriousness, how dangerous could surface lip contact with a 1/2" x 1/4" strip of lead (the upper surface is brass) really be? I mean, I know that little kids get brain damage from eating lead paint chips, but that’s not what we’re talking about here.
Disclaimer: I am not a biochemist, nor do I play one on TV. Having said that …
The black stuff the dentist has you spit out after installing a filling is metallic mercury – remember the metallic taste? Some of it is undoubtedly swallowed and passes through the system, presumably without noticable effect. Andrew Jackson, famous for many things, lived several decades of his life with the lead pistol ball he had received in a duel so close to his heart that the physicians didn’t dare to try to remove it. It was there while he served as President of the United States.
Recalling my disclaimer above, it is my understanding that heavy metals, as metals, are really not so dangerous as when they exist as compounds, particularly organic ones. This is why tetraethyl lead is so dangerous: Lead in organic compounds is much more easily assimilated. I also understand that lead fumes, as when working with molten lead, or fine lead dust, are more easily absorbed by the lungs than other forms; but as Chuck Clark observed, that’s not what we’re talking about here.
Lead pipe was once used in municipal water systems because of the relative inertness of metallic lead – its resistance to corrosion – and it’s only a problem if the water is soft. Hard water precipitates a coating on the inner surface of the pipe, isolating the lead from the stream. Soft water doesn’t do this, and further tends to dissolve the lead ( see ‘compounds,’ above ). One wonders in this context about the chemical properties of saliva.
I suppose my practice would be to regard an instrument with a lead or lead-coated mouthpiece as an interesting curiosity rather than as one to be played. There are so many really fine instruments available nowadays which are lead-free that I don’t think I would find it necessary to play it.
For what it’s worth, this is what I know – or what I think I know. Your mileage may vary, and I’m certainly not quarreling with those who do play such instruments.