Humidity Quick Zap

[Don]

Hi Bill,

So why do *forced* drying methods lead to even looser centers than the
overnight natural drying then? Something is wrong with the theory of
"compression set" I fear.

As "rapid" fixes sometimes a heat gun or hair drier by itself will
work--particularly if some misguided tech has used wd-40. It seems to "burn
off" the contamination--at least for a while.

At 07:43 PM 12/13/02 -0500, you wrote:
>Sarah,
>
>Your experience seems to be completely the opposite of those of us 
>who have used the alc/H2O treatment quite successfully. The alcohol 
>is a surfactant, allowing the wool cloth to soak of the water. Water 
>laden, the bushings now squeeze against the center pins, and during 
>the 24 hours (roughly rumored thereabouts) is takes the water to 
>evaporate, the wool fibers take a compression set around the pins. 
>Once the bushings have dried out this compression set will have 
>produced a looser fit.
>
>Granted it won't work on bushings contaminated by paraffin oil or 
>WD-40, or rusted pins. But those situations are the extreme (except 
>of course for an entire era of Steinway), and are easily spotted.
>
>Time is an unavoidable ingredient in this process. Simply soaking the 
>bushing and immediately thereafter chase it out with a hairdryer 
>won't allow the compression set to occur. Tommy should confirm that 
>this action is not suffering from one of the exceptions, then pick up 
>pick it up some morning, apply the alc/H20, and bring it back the 
>next morning.
>
>Bill Ballard RPT
>NH Chapter, P.T.G.
>
>".......true more in general than specifically"
>     ...........Lenny Bruce, spoofing a radio discussion of the Hebrew 
>roots of Calypso music
>+++++++++++++++++++++
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives
>
>

Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T. Tuner for the Center of
the Arts

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