wood response to moisture

[Marcel Carey]

Dave,

My findings are quite the opposite. I find that key bushings do get
tighter with dry weather. For the soundboard to react slower the
explanation is quite simple. The soundboard is "sealed" being finished
on both sides as where the keys are not.

Marcel Carey, RPT
Sherbrooke, QC

> -----Original Message-----
> From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]On
> Behalf Of Dave Nereson
> Sent: November 11, 2004 3:52 AM
> To: pianotech@ptg.org
> Subject: wood response to moisture
>
>
>     I'm pretty sure I read in a recent post or Journal
> article that the
> soundboard can take a lot longer to lose moisture than it
> did to gain it.
>
>     But then I read in an article by Susan Graham [The
> Technical Forum, PTG
> Journal, Oct. '88] that "keys stick in wet weather. . .
> because the hole has
> tightened around the balance rail pin, having clearly
> gotten smaller as the
> wood has expanded.  The reason for this is the way in which
> wood takes on
> moisture.  First of all, it takes on moisture three times
> more slowly than
> it loses it, . . . ."
>     That's just the opposite of the what I had heard and
> read before.  Which
> is it?  Anybody know?
>
>
>
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives