back covers for vertricals

[Isaac OLEG]

On traditionally build verticals there was always a thin satin cloth (mix of
silk & cotton), that prevent dust to go on the soundvboard/in the piano, but
more important I suspect it plays a role in regulating the R.H. ambience of
the piano.board

As verticals are along a wall most of the time, very few air flow I guess.

I am unsure of the use of silk for that purpose, but I believe it was the
cloth of choice since the discovery of artificial silk.

On almost all verticals since 1950 or so I've find a wooden frame with this
thin cloth.

We tend to forget it actually when rebuilding, for cutting costs, but I am
not sure it is a good thing. If tere is an opening in the back of the board
I always put a new cloth .

Regards.

Isaac OLEG


> -----Message d'origine-----
> De : owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]De la part
> de Paul Chick (EarthLink)
> Envoyé : lundi 20 mai 2002 15:43
> À : pianotech@ptg.org
> Objet : Re: back covers for vertricals
>
>
> Bill
> I've installed bacovers on piano backs for 25 years with the
> proper material
> and have had no complaints or comments about their affect on the piano
> sound.
>
> Paul Chick
> ----- Original Message -----
> From: "William J Schlipf" <wjstuner@juno.com>
> To: <pianotech@ptg.org>
> Sent: Sunday, May 19, 2002 8:19 AM
> Subject: back covers for vertricals
>
>
> > Just wondering if anyone had comments on the use of acoustically
> > transparent materials, like speaker grill cloth, on the backs
> of vertical
> > pianos in churches or homes where the owners of the instrument
> don't want
> > the soundboard, posts, et al to show.  I was at a customers home the
> > other day and heard about a raging battle between some people
> in a church
> > because of this.  (Some want to cover and some don't)  I told the the
> > lady that if done properly, there are no take-aways from the
> sound of the
> > instrument and don't know why the battle is raging.  Now I do not take
> > care of the church's instruments so I have no axe to grind here, but I
> > was curious as to all your thoughts on the subject.  Thanks for anything
> > you have to share!
> > Bill Schlipf
> > Bloomington, IL
> >
> >
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