Interestingly Stable

[gordon stelter]

It might be a 2-part catalyzed varnish, such as the
"Duravar" I used on my last board. This is the stuff
that bowling lanes  are varnished with nowadays.
Amazingly hard, but sprayable. The worst thing about
it was the HUGE quantity of fomaldehyde fumes fit
emitted for months after appolication.
     Thump

 --- ANRPiano@aol.com wrote:
> 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
> 



		
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