Thanks, Chris. Egg white was suggested by some modern makers about 30
years ago, but I never tried it.
In modern times, different makers use different methods, and it might be
that some use shellac, I don't know.
As far as I know, there is no evidence of any finish on old lute
soundboards. If anyone has such evidence, I would be very interested to
see it.
Best wishes,
Martin
On 20/01/2015 14:59, Chris Barker wrote:
Dear fellow lute enthusiasts,
There has been some recent discussion of soundboard finishes on the
lute site. It is my understanding that in the old days many lute
soundboards were finished with brushed on thin coats of egg white. I
believe the intention here was to create a protective finish without
adversely affecting (dampening) the sound. Several subscribers
recommended Tung Oil, other oils, and varnishes. All of these would
protect the soundboard very nicely, but the all would slightly dampen
sound. The best of both worlds can be achieved with a French polished
finish using shellac. French polish application is a little different
from brushed or sprayed on finishes, and a little training in
application techniques would be vastly helpful. The result: A thin
protective finish that does not penetrate deep into the soft coniferous
soundboard, and thus does not dampen sound. French polish is not as
durable as varnish or hardened oil, but it is far superior to egg
whites, and it still gives the soundboard protection and allows for a
fully developed sound.
Respectfully submitted,
Chris
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