Glassing pinblocks

[Farrell]

What we are addressing here is placement of a small bead of epoxy along the
forward edge of the pinblock where it butts up to the flange of the plate.
It is generally accepted that good mating of these two surfaces may be
important to achieving a stable piano. Traditionally, the two surfaces were
mated by laborious (IMHO) shaping of the pinblock edge. Use of epoxy there
can make the process faster, easier and arguably a better fit.

The epoxy never gets anywhere near the tuning pins.

Terry Farrell

----- Original Message ----- 
From: <sarahdfox@columbus.rr.com>
To: <pianotech@ptg.org>
Sent: Saturday, July 03, 2004 12:58 AM
Subject: Re: Glassing pinblocks


> Hi all,
>
> I was thinking about this polyester resin vs. epoxy thing, and it occurs
to
> me that polyester resin often ends up with traces or pockets of glycolic
> acid, which could corrode the tuning pins.  I've done enough work on
> fiberglass boats (polyester resin construction) to know how nasty that
> glycolic acid can be.  And it sticks around forever, rotting hulls from
the
> inside out.  I recently finished ridding the hull of one boat of some of
> its circa 1977 glycolic acid (which created osmotic blisters, for those of
> you who know what that is).
>
> I would think epoxy would be much kinder and gentler to the tuning pins.
> But of course it releases oils after it cures.  So perhaps there's a
> problem there, too?
>
> Peace,
> Sarah
>
>
> --------------------------------------------------------------------
> mail2web - Check your email from the web at
> http://mail2web.com/ .
>
>
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives
>