Soundboard bleaching

[Michiel van Loon]

Stan,
After shimming ,cleaning and removing the old varnish, I normally bleach
soundboards using 30%H2O2 and Ammonia.
I apply the H2O2 first, using a sponge and immediately after that using an
other sponge I apply the Ammonia.
Protect your skin, eyes and clothes.
Let it dry and scrape of the varnish that came loose, still protecting your
skin.
regards,
Michiel van Loon,
Meppel
Holland
mvanloon@xs4all.nl

-----Oorspronkelijk bericht-----
Van: Stan Kroeker <skroeker@mts.net>
Aan: pianotech@ptg.org <pianotech@ptg.org>
Datum: dinsdag 27 april 1999 21:59
Onderwerp: Soundboard bleaching


>Normally, after shimming a cracked soundboard we simply delight in the
>contrast of carefully fitted new spruce shims next to aged soundboard wood.
>However, we are rebuilding a 1926 Heintzman 7' grand and would like to
>achieve more uniformity in color on the shimmed board.
>
>Anyone care to share opinions, experiences, techniques and sources of
>supply re: bleaching of soundboards prior to refinishing?
>
>Best regards,
>
>Stan Kroeker
>Registered Piano Technician
>
>Kroeker & Sons Piano Experts
>59 Quiring
>Winnipeg, Manitoba
>Canada  R2G 1Y5
>
>Ph. 204-669-5881
>
>
>