[pianotech] Cracked plate

[Greg Newell]

Conrad,
	Not sure I buy your explanations. Either involve the manufacturer
and some sort of touch up or cover up by them. Who else would have the exact
color they use to spray the rest of the plate or plates in the factory, and
probably in quite a large quantity too. The touch up color at least should
have been a perfect match. 

Greg Newell
Greg's Piano Forté
www.gregspianoforte.com
216-226-3791 (office)
216-470-8634 (mobile)

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Conrad Hoffsommer
Sent: Friday, June 05, 2009 6:29 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] Cracked plate

On 6/4/09, Greg Newell <gnewell at ameritech.net> wrote:
> Bryn,
>
>                 You might be right about the low stress but, where did it
> come from in the first place? Seems there is some stress somewhere that
> caused it, no?



just a guess or two...

a. It looks like that area's paint was touched up at the factory (like
to cover up a crack?). The touch-up is very crude, doesn't match and
the piano has suffered from embarrassment-caused low self-esteem ever
since and finally "cracked" under that stress. ?

b. It may have been the manufacturer's first foray into full plates at
the turn of the last century and they just added the upper part of the
casting to the old 3/4 plate mold but didn't quite get the
cooling/annealing process quite right leaving internal stress at that
corner.


-- 
anOn