Restoring crown in old soundboards - new cracks

[Greg Newell]

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Isaac,
         I've used both Weldwood and Titebond. Just seems a bad idea. I'd=20
rather replace the board.

Greg Newell





At 04:45 AM 4/16/2003, you wrote:

>Hello,
>
>I by chance did not see yet (more recent) shims of mine cracking, but
>since I uses a router to open the crack, the joint is cleaner and not
>made of crushed wood.
>
>I still wander what glue of choice to use on these shims, Plastic
>resin from Weldwood (UreaFormalheyde monocomposite), Titebond ((I
>doubt). We have in Europe Caurite which is too a UreaFormol , but the
>joint may be the thinner possible (no strength of the glue by itself).
>
>What are you using generally (if you don't mind ?)
>
>And yes almost all the shims that have been made 10 to 15 years ago
>are opening again on almost all the instruments I see.
>
>best Regards
>
>Isaac OLEG
>
>Entretien et r=E9paration de pianos.
>
>PianoTech
>17 rue de Choisy
>94400 VITRY sur SEINE
>FRANCE
>tel : 033 01 47 18 06 98
>fax : 033 01 47 18 06 90
>cell: 06 60 42 58 77
>
> > -----Message d'origine-----
> > De : pianotech-bounces@ptg.org
> > [mailto:pianotech-bounces@ptg.org]De la
> > part de Greg Newell
> > Envoy=E9 : mercredi 16 avril 2003 04:39
> > =C0 : Pianotech
> > Objet : Re: Restoring crown in old soundboards
> >
> >
> >
> > Keep watching! You'll almost be able to see them crack
> > before your very eyes.
> >
> > Greg
> >
> >
> >
> > At 07:50 PM 4/15/2003, you wrote:
> >
> > >While the list is discussing soundboard crown at the
> > moment, I thought I
> > >might mention that a piano dealer sent a 100 year old
> > Steinway grand with a
> > >badly cracked soundboard back to the factory in Hamburg
> > for restoration.
> > >Well, =A38000 ($12k) and 3 months later it came back
> > sounding perfect. To my
> > >surprise, I was told that, the factory did not install a
> > new soundboard but
> > >instead repaired the original by shimming, i.e. filing in
> > the cracks with
> > >those V shaped wedge fillets.
> > >  When I was at piano college we were told that this is a
> > method used to
> > >restore crown "in situ" as it were. The theory, I suppose,
> > is that if you
> > >wedge more material into the panels, it will force the
> > panels to bow or bend
> > >back into shape. I have not yet had the opportunity to put
> > this to the test,
> > >but have any of you tried this method or think it feasible.
> > >
> > >Regards
> > >Alan Forsyth
> > >Edinburgh
> > >    "Madam, all pianos sound horrible, but if you play
> > music on them they
> > >sound very nice!"  (from my forthcoming book, "A Day In
> > The Life Of a Piano
> > >Tuner" by yours truly)
> > >
> > >_______________________________________________
> > >pianotech list info: https://www.moypiano.com/resources/#archives
> >
> > Greg Newell
> > mailto:gnewell@ameritech.net
> >
>
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives

Greg Newell
mailto:gnewell@ameritech.net=20

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