Soundboard installation with hide glue

[Stéphane Collin]

Hi Ric.

You put the finger right on the right place.
Yes, I bought a pre ribbed board made by Ciresa.  They claim they can do any
job on your specifications, but I myself had no specifications to give that
I would have believed being better than their standard procedure.  I will
have their protocol on Monday.
So I asked for their standard procedure, which I think is quite nice, as the
board was nicely crowned at 40 % humidity.
Apparently, I dried the board too much, as it went reverse crowning.
Strange enough, after 24 hours back in 40 % 22 ° celcius environment, the
board still remains reverse crowned.  I'm fearing something irreversible
happened.
I'm both very unhappy to have probably destroyed this nice board, and happy
to learn things the hard way (the only one that lasts).
As I said to Terry, strange how you can read tons about a topic, yet it is
when you get your hands on it that you see what happens in real.

Again and again, thanks to you and all for generous knowledge share.

Best regards.

Stéphane Collin.

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Richard Brekne
Sent: jeudi 17 janvier 2008 19:06
To: pianotech at ptg.org
Subject: Soundboard installation with hide glue

Hi Stéphane

Am I to understand you bought a pre ribbed and crowned board, had it 
shipped to you and then now you are drying the assembly out to install 
it in your piano ? Do you know how the panel was crowned to begin 
with... I mean exactly how all the crown was achieved ?

On a general note.. this raises an issue for those of us with less 
experience installing soundboard. Under what circumstances would one dry 
out the ribbed assembly for installation in the case ? All panels 
regardless of how crown was achieved ? Whys, whats, and wherefors 
appreciated.

Cheers
RicB