Interestingly Stable

[ANRPiano@aol.com]

---------------------- multipart/alternative attachment
Dave,
 
This has been a question I have been pondering for a while now.  I  have had 
two situations which have got me thinking about the relationship  between 
soundboard finish and tuning stability.  For several years now I  have used a 
marine epoxy to seal all of my old soundboards to add lost stiffness  and then top 
coating with either shellac (which I am no longer using) or the  water borne 
lacquer.  Once these pianos have settled down they are  remarkably stable with 
very little pitch movement.  (Quite an  accomplishment in Chicago.) And the 
other experience, though with a shorter time  frame and more antidotal, is my 
friend David Graham's experience with Fazioli  pianos.  I had a conversation 
with Mr. Fazioli when he was in town  regarding the finish on his soundboards, 
there was something of a language  barrier, but I gathered he had a water 
barrier sealer he applied to both sides  of his boards. David tells me, much to his 
disappointment, that these pianos are  remarkably stable for their 
environment.
 
So, do you have any idea what kind of finish is on the soundboard?  A  
finishing material which doesn't do screwy things with the stiffness of the  panel 
would actually be the answer to tuning stability problems at least as far  as 
soundboard generated problems goes.
 
Andrew Remillard

---------------------- multipart/alternative attachment
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/28/1c/3e/ca/attachment.htm

---------------------- multipart/alternative attachment--