Compression ridges and hide glue.

[Farrell]

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Any idea what might explain your observation? I don't see how the glue =
used on an edge joint could affect the development of panel ridges - be =
it Titebond, cold/hot hide glue, epoxy, or whatever.

Terry Farrell

----- Original Message -----=20
[link redacted at request of site owner - Jul 25, 2015]
To: "Pianotech" <pianotech@ptg.org>
Sent: Sunday, September 28, 2003 9:20 PM
Subject: Re: Compression ridges and hide glue.


> gordon stelter wrote:
> > I was wondering today if glue-line creep could be
> > considered a significant factor in the ( alleged )
> > self-destruction of compression-crowned boards? After
> > all, hide glue becomes fairly gelatinous in all but
> > very low humidity, so this, combined with the glue
> > line stress in CC boards could lead to premature
> > failure, and increased compression-ridging.
> >      But this may be much less of a  problem with
> > modern glue types.
> >     Right?
> >     Thump
>=20
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> Well Thump,
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> I think you have this completely backward. Hide glue is the best glue=20
> for panel edge joints. I had problems with pre made panels in the dark =

> past. They were glued with the other alternatives (probably Tightbond) =

> and I would have seasonal ridges at the joints. When I made my own=20
> panels I used hide glue and never had the problem again. I have been=20
> making my own panels ever since. Piano rebuilding is like baking; for=20
> the best results make you own pie crust. And the old way with real=20
> butter taste a lot better the Crisco.
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> I size the edges with thin hide glue the day before the glue up. Check =

> out the photo here:
>=20
[link redacted at request of site owner - Jul 25, 2015]
>=20
> John Hartman RPT
>=20
> John Hartman Pianos
[link redacted at request of site owner - Jul 25, 2015]
> Rebuilding Steinway and Mason & Hamlin
> Grand Pianos Since 1979
>=20
> Piano Technicians Journal
> Journal Illustrator/Contributing Editor
[link redacted at request of site owner - Jul 25, 2015]
>=20
>=20
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
> 
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