When to do it

[Richard Brekne]

Tony Caught wrote:

> Hi Jim,
>
> And yes wool felt does expand.  In my first post on this subject I mentioned
> that there is a high possibility that the backtouch felt used by Yamaha,
> which is "not wool felt" may not expand as much as does "wool felt" thus
> giving the Yamaha more stability in this area.
>
>

Is it your experience then that Yamahas do not show unstability relative to lost
motion after humidity changes then ?

>
>
> Regards
>
> Tony Caught ICPTG
> Australia
> caute@optusnet.com.au
>
> ----- Original Message -----
> From: <JIMRPT@aol.com>
> To: <pianotech@ptg.org>
> Sent: Friday, December 29, 2000 7:34 AM
> Subject: Re: When to do it
>
> >
> > Terry, et al;
> >  I have no doubt that leather tends to swell up when soaked with water but
> I
> > don't 'think' that wool does so. Has anybody done any experimentation on
> > whether wool changes size with moisture absorption? There has been much
> > speculation in this thread based on the felt changing size and I wonder if
> it
> > really does?
> > Just a passing thought.
> > Jim Bryant (FL)

--
Richard Brekne
RPT, N.P.T.F.
Bergen, Norway
mailto:Richard.Brekne@grieg.uib.no