removing key pins

[Elian Degen J.]

Wood shrinks Conrad but not towards the center of the piece, but towards the
smaller of its units, the cells which compose it, not towards the centre of
the cell but to its membranes, in a second instance something similar
happens towards the wood fibers, in some way what hapens it is a bit
complex, cohesion, and tubular microscopic wood grain will keep shape and
will in some way diminish shrinkage of the whole piece, but this one will
loose density  and flexibility.

Elian
----- Original Message -----
From: "Conrad Hoffsommer" <hoffsoco@luther.edu>
To: <pianotech@ptg.org>
Sent: Friday, September 06, 2002 09:17
Subject: Re: removing key pins


> Friends,
>
>
> > > "Holes in wood get smaller as humidity goes down..."
>
> I don't think so.
>
> > > I have heard this before. Believe me, I am not trying to start an
> >arguement - just trying to understand. If a hole gets smaller, then why
do
> >tuning pins get more loose with lower humidity?
>
>
> I always thought that the wood shrinks away from a surface, or to put it
> another way, towards the center of itself.
>
> ...so...
>
> If you have a hole in the center of a chunk of wood the center isn't there
> anymore. The wood would shrink towards a line halfway between the surface
> of the hole and the outside of the chunk of wood (or another hole) - thus
> making the hole larger.
>
>
> Am I as confused as usual about this, or more?
>
>
>
> Conrad Hoffsommer PTG RPT, MPT, CCT
>
> Certified Calibration Technician (CCT) for Bio-powered Digitally Activated
> Lever Action Tone Generation Systems
>
>