Soundboard recrowning and rib re-arching.

[gordon stelter]

    Those who have "poo-pooed" soundboard recrowning
haven't gone about it the alleged "right way", i.e.
drying the piano in 10% RH for a  couple of weeks,
screwing boards with threaded inserts across the back,
and using bolts to impinge on the ribs, at the crack
line, to really open them up specifically at that
point. Then putting in shims made of old soundboard (
"petrified" as it has been called here ) in cracks
that are COMPRESSRED open, not carved out with a 
router or chisel. That is the way 
D.L. Bullock says he's been doing it, with success,
and I believe him.
     I would, though, like to add this suggestion: I
was discussing all this with a  major rebuilder who
asked. "But what are you going to do about the ribs?
They're part of the crown, too."  Pondering this on
the way home from his shop, it occurred to me hat the
ribs might be scraped clean of finish. Then, ina
"flexed out" state, painted with super-thin CA glue,
whicj should impregnate the wood, making ita  lot
stiffer.
    If any of y'all want to try this before I get a
shot at it, and report back, please do!

     Thanks,
     Thump


 

--- Phil Bondi <phil at philbondi.com> wrote:

> The Esteemed Colleague in the NE quadrant of the
> Sunshine State says:
> 
> 
> JIMRPT at aol.com wrote:
> >
> >
> > Dave;
> > It is not whether the laquer is "high solids" or
> not but the ratio in 
> > which you mix the formula. Any good quality laquer
> will work as long 
> > as you use 'gloss' and not any rubbed effect
> formulation.
> > Ratios vary wildly amongst the list...I prefer to
> use a 10-12 % ratio 
> > -laquer to thinner.
> > jim bryant (FL)
> 
> Dear Dr. Bryant:
> 
> It was suggested to me a few years ago..I believe a
> few members of the 
> CAUT list, suggested that while an ordinary lacquer
> would work, you 
> would get better, quicker, and more consistent
> results from one with a 
> higher content of solids.
> 
> One that was suggested was Sherwin Williams.
> According to the sales 
> person, I bought the last gallon here locally, and
> they were not going 
> to be getting any more.
> 
> While you have maintained your 'perfect' record with
> me, this is a 
> subject I feel I may have somewhat of a experienced
> say...for a change!
> 
> The Humbled Colleague Who Has Called Dr. Bryant As
> Recently As Last Monday,
> 
> -Phil Bondi(Fl)
> 
> 
> 
> 


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