[CAUT] Teflon AND verdigris?

[Mark Cramer]

Actually the verdigris is on the centre-pins, the wooden flanges and on the
brass rail. 

 

I'm just surprised to find verdigris in this vintage of action, believing as
well that it was a paraffin thing of the past.

 

David Kirkland suggested some kind of lube used after the instrument left
factory may have caused this. And the presence of center-pins with ends
nipped certainly indicates some kind of generic field-work.

 

Meanwhile, we're experimenting with Ballistol. 

 

I know from past experience that any number of treatments work on verdigris
in the short term, and some like Bourbon, last a long while.

 

My only concern is not to damage the Teflon in the process. To that end,
we've got a Teflon bushing soaking in Ballistol overnight. though I'm not
sure exactly what I expect to happen.!? :>)

 

In any case, we just need to get some useable up-weights happening, as this
instrument, in it's otherwise original condition is really quite nice. 

 

So tomorrow, unless warned otherwise, I think we'll go ahead with Ballistol.

 

Thanks,

Mark      

 

 

 

  _____  

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Avery
Todd
Sent: November 5, 2008 3:01 PM
To: caut at ptg.org
Subject: Re: [CAUT] Teflon AND verdigris?

 

I don't understand how there can be verdigris on teflon. I thought that was
always a felt/wood/parrafin thing. Can someone enlighten me? 

 

Avery Todd

Houston, Tx 

On Wed, Nov 5, 2008 at 1:46 PM, Mark Cramer <cramer at brandonu.ca> wrote:

Regulating a 63' Teflon action L for a good friend, I was surprised to find
verdigris at the hammer flange centers.

 

This is a solid Teflon action with nice firm centers and no clicks, however
with verdigris, hammer-flange friction in some cases exceeds 10 grams.

 

Steinway warns against lubing Teflon parts, nonetheless I have to wonder if
there is some Q & D means of easing the verdigris without damaging the
teflon?

 

I know that whether we properly disassemble, clean, ream and re-pin the
parts, or simply squirt in a bit of miracle juice, the verdigris will come
back. However, something that will extend the use of these otherwise
moderately worn parts, is entirely appropriate for this particular piano. 

 

Given the recent discussion of lubing key-bushings, I'm just concerned that
the solvent/carrier in CLP for instance may dissolve/harden the Teflon,
while perhaps ProLube may not?

 

Anyone know for sure?

 

Thanks,

Mark Cramer, RPT

Brandon University     

 

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