[pianotech] piano behavior - shrinking with H20 & alcohol - list mechanics

[Tom Driscoll]

David,
    Are you now or were you ever an engineer ?  <G> Just kidding really , but I think this is an example of putting way too much importance in the minutia of the process. The alcohol gets the water into the wool. The wool gets wet. Wet is wet . If you are shower for two minutes or five minutes you don't get any more wet. I'm not being condescending here but the bushing is saturated with water then dries.
 Now if you repeat the entire process after a complete cycle then I might be convinced that the shrinking would happen again and the center may get too loose.
We -- myself included -- can get bogged down in details when as in this case exact science ain't required.
Just my take and best wishes to you,
 Tom Driscoll
    
  ----- Original Message ----- 
  From: David Skolnik 
  To: pianotech at ptg.org 
  Sent: Sunday, November 27, 2011 1:38 PM
  Subject: Re: [pianotech] piano behavior - shrinking with H20 & alcohol - list mechanics


  Patrick -
  You, perhaps inadvertently, transposed my question.  I wasn't suggesting alcohol-water over naphtha (sorry for previous mis-spelling), but the other way round.  As best as I can tell, naphtha does not contain water and is a solvent, thus, I would think it would clean without shrinking.  As far as the manufacturer's suggestions, isn't this a similar problem for which Wurlitzer proposed using mineral oil and silicone?  And of course, who can forget the manufacturers (Baldwin) suggestion as to how to deal with black butt corfam, or whatever)? 
  My fairly specific question with regard to shrinking is the effectiveness of controlling both the amount of water in the mix (as per previous posts) and the amount of shrinking that occurs.  Why (I'm about to do that think that Ron hates: speculate) would you assume, or find, that shrinking positively addresses a center that is waxified?
  Thanks -
  David Skolnik
  Hastings on Hudson


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