Epoxy on soundboards

[David Love]

There's some evidence of this problem I find on key repairs.  Before I
discovered AcryliKey II, I used epoxy to make repairs on chipped keys.
It's pretty evident after a couple of years that the stuff doesn't hold
up well if not protected.  While none of the pianos that have the repair
is exposed to direct light, the epoxy has reached a stage where it is
starting to get brittle and crumble and has yellowed considerably.
While I can't be sure that the reason is UV light, there is certainly
something going on that is causing this deterioration.  

David Love
davidlovepianos@comcast.net 

-----Original Message-----
From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
Behalf Of gordon stelter
Sent: Wednesday, October 20, 2004 5:23 PM
To: Pianotech
Subject: RE: Epoxy on soundboards

Thanks David, despite my unfortunate retort. As soon
as I sent it I realized that a thin coat of UV
resistant stuff would do more good than harm. 
    Thump


--- David Love <davidlovepianos@comcast.net> wrote:

> Epoxy is sensitive to ultra violet light.  Even the
> best laid plans to
> keep UV light away from the board aren't always
> effective.  A spray coat
> of lacquer or varnish with UV blockers is
> recommended by Del Fandrich in
> the article he wrote on the subject.  
>  
> David Love
> davidlovepianos@comcast.net 
> -----Original Message-----
> From: pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org] On
> Behalf Of Joe Garrett
> Sent: Wednesday, October 20, 2004 4:25 PM
> To: pianotech
> Subject: Re: Epoxy on soundboards
>  
> David Love said: "It doesn't much matter even if it
> dries with a flat
> glossy film.  Epoxy
> is UV sensitive so you still have to sand it (for
> adhesion) nd coat it
> with a finish that has UV blocking or the epoxy
> tends to break down over
> time.
> 
> David,
> Huh?!!!!! UV should never be on a soundboard.
> (Period)!!!!  So, what the
> heck is this all about? If you want to put a finish
> over the epoxy, have
> at it! I think it is over-kill and may just un-do
> the effect you are
> looking for, (better sustain/volume) Too much finish
> on a soundboard
> will kill the sound. I've seen it many times. The
> worst being a
> Polyester finish on a 9' Bechstein, rebuilt on the
> Euro Continent. That
> was the deadest piano I've ever heard! Yikes!
> Regards,
> Joe Garrett, R.P.T.
> Captain, Tool Police
> Squares R I
> 



		
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