Swollen key leads

[David M. Porritt]

It is oxidation.  The white powder is lead oxide and if you breath enough of
it you can significantly lower your IQ.

dave

_______________________________
David M. Porritt, RPT
dporritt@swbell.net <mailto:dporritt@swbell.net>
Meadows School of the Arts
Southern Methodist University
Dallas, TX 75275
_______________________________


-----Original Message-----
From: owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]On Behalf
Of David ilvedson
Sent: Monday, June 28, 1999 12:02 PM
To: pianotech@ptg.org
Subject: Re: Swollen key leads


I always  thought it was oxidation.  In a similar situation,
which I have only come across once on a birdcage piano, the
lead has white powder on it.

David Ilvedson, RPT

From:           	cgpiano@webtv.net (Carman Gentile)
Date sent:      	Sun, 27 Jun 1999 22:54:12 -0700 (PDT)
To:             	pianotech@ptg.org
Subject:        	Swollen key leads
Send reply to:  	pianotech@ptg.org

>  This is to reiterate what one of our colleagues has already said:   the
> quickest and safest way I have found to trim down swollen key leads is a
> sharp chisel.   Just slice 'em off clean, no lead dust to deal with.
> The lead slices easily.
>
>    Can anyone tell me what makes the leads swell--I always thought of
> lead as stable, inert,  and not prone to corrosion.
>
> Carman Gentile, Redwood Chapter
>
>
>
>
>


David Ilvedson, RPT
Pacifica, CA
ilvey@jps.net