Re: Bösendorfer Rim

[William R. Monroe]

Okay, okay, okay....

Crawling back to my hole now. ;-]  Thanks for the information.

William R. Monroe
----- Original Message ----- 
From: "Farrell" <mfarrel2 at tampabay.rr.com>
To: "Pianotech List" <pianotech at ptg.org>
Sent: Thursday, April 20, 2006 9:01 AM
Subject: Re: Bösendorfer Rim


> Well, the 212F+ temperature is above the boiling point of water, so you
will
> indeed drive all the liquid water out of the wood. Held at that
temperature,
> the wood MC will come into equilibrium with the environmental RH. So if
that
> is low you will at least get 99.999999999% of the water out, and if it is
> high, I guess you would still get 99+% out.
>
> But what actually happens in real life at that temperature is that you
also
> start driving off some of the volatile compounds in the wood, so that when
> you periodically weigh the wood sample to see if the water is driven off
> (weight becomes steady), the sample weight loss slow drastically, but
never
> really stops completely.
>
> Can we drive every molecule of water out of a wood sample - speaking in an
> absolute sense in the real world (or at least in my oven) no, I suppose
not.
> Can we drive it all out for most any practical purpose, sure - heat it up
to
> 212F+, hold it for a couple hours, and that sample will be dry at zero MC.
>
> Terry Farrell