backchecks

[Keith Roberts]

Glue compatibility. You just scraped off the old stuff instead of soaking
them off and removing as much of the old glue as possible. Hot hide is the
only choice because not only it will reactivate the glue that is still
there, it will set in seconds so clamping isn't a great issue. 10 clothespin
clamps moved on down the line as you go should do it.

Should you stretch the leather or buckskin first?

kpiano



> Any reason not to use PVC-E with clamping for 1/2 hour or so? Haven't
tried
> it, anybody ... ?
>
> Alan R. Barnard
> Stickin' to it in Salem, MO
>
>
> -----Original Message-----
> From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
Behalf
> Of David Love
> Sent: Wednesday, January 19, 2005 9:12 PM
> To: ilvey@sbcglobal.net; 'Pianotech'
> Subject: RE: backchecks
>
>
> Hot hide will work.  Take a pair of shears and cut the leather in the
middle
> (since it's not glued to the leather you can just slip the shears between
> the leather and the felt).  Peel off the leather and scrape the backcheck
> clean as much as possible.  Put on a thin coating of hide glue on the
wooden
> part of back check first.  Don't use any urea in the mix as you want it to
> set up as quickly as possible.  Let the glue thicken before you apply the
> glue to the leather and glue the top of the back check first and do the
> entire set from one end to the other.  Go back to the beginning and put
the
> glue on the leather for the bottom end and hold it in place with your
finger
> for a 10 seconds or so and go to the next one.  A clothes pin also works
> well.  When you finish go back to the beginning and use a pair of flush
cut
> center pin knippers (like #230 in the Schaff Catalogue) to nip off the
> excess on the low side of the back check.  To get it done in 2-3 hours,
you
> will need to precut the leather before hand and preheat the hide glue just
> before you drive over to the customer's house (assuming you are doing this
> on site) so that the glue will reheat quickly once you arrive.
>
> David Love
> davidlovepianos@comcast.net
>
> -----Original Message-----
> From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On
Behalf
> Of David Ilvedson
> Sent: Wednesday, January 19, 2005 6:29 PM
> To: pianotech@ptg.org
> Subject: backchecks
>
> List,
>
> I have a Steinway D with numerous torn backchecks caused by poorly
> shaped tails with deep checkering etc.   I need to repair and intend to
> recover with buckskin.  I perused the archives and the only mention of
> this was a good post by David Swartz.   He uses CA glue.   I do need to
> do the repair within a time frame of 2 to 3 hours.   Would any other
> glue work as well as CA without the wicking problems (if there are any)? I
> would imagine hot hide glue would be the best but would the first gluing
> hold after an hour enough to stretch the leather and glue the
> other side?   I'm figuring on clothespins....
>
> Thanks in advance
>
> David Ilvedson, RPT
>
>
>
>
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