Epoxy on boards

[Delwin D Fandrich]

----- Original Message -----
From: "gordon stelter" <lclgcnp@yahoo.com>
To: "Pianotech" <pianotech@ptg.org>
Sent: March 03, 2003 6:43 AM
Subject: Epoxy on boards


> And, do you think this would be
> useful in maintaining crown if it were allowed to cure
> while the board were in an artificially flexed state,
> and would that be beneficial?

As I've pointed out in the articles, there is no material or process I've
ever encountered (either of my own invention, including this one, or that of
others) that will restore or maintain crown in a compression-crowned
soundboard. For a further explanation of why this is true you'll have to go
back in the Journal some to my articles on the subject:

- The Mechanics & Strength of Wood & Wood Structures Part 1,
    April, 1996
- The Mechanics & Strength of Wood & Wood Structures Part II,
    June, 1996
- Soundboard Damage Part I - A Guide to Sound-board Cracks & Other Maladies,
    December, 1997
- Soundboard Damage Part II - A Guide To Sound-board Cracks & Other
Maladies,
    January, 1998
- Soundboard Damage Part III - A Guide to Sound-board Cracks & Other
Maladies,
    February, 1998

(I'm sure there are other places to find this information as well, but I'm
familiar with these.)

The ideas explored in the articles on coating soundboards with epoxy do not
depend on restoring or maintaining crown. The process described uses the
coating epoxy/wood matrix to emulate the stiffness lost as the original
crown dissipated over time.

Del