[pianotech] Gram weight question

[John Ross]

I didn't even know about the numbers. I just bought what the piano supply houses sold.
I now buy from Lee Valley, and I did notice it seems to be of a better quality.
But I didn't notice the numbers.
John Ross,
Windsor, Nova Scotia
  ----- Original Message ----- 
  From: jim ialeggio 
  To: pianotech at ptg.org 
  Sent: Monday, June 08, 2009 8:46 AM
  Subject: Re: [pianotech] Gram weight question



  Great thread

  Hey Ron,

  I'm trying to understand In practical terms the difference between 192g and 251g hide glue. I have been using 251 for everything but have a lb of 192 to play with.

  In practical terms, how is the 192g going to behave differently from 251g...

  Do I have this right...

  192g will achieve a thinner viscosity with less water? 

  Given a similar working viscosity, same temp, 192 will gel quicker than 251 because it has less water to lose?

  In well fit joint, given similar working viscosity 192 leave more cured glue in the joint than 251, since less of it is water? 

  What about bushings?

  Jim I



  -- 
  grandpianosolutions.com (under construction)
  Shirley, MA  (978) 425-9026
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