glueing controversy

[Richard Moody]

----------
> From: Delwin D Fandrich <pianobuilders@olynet.com>
> To: pianotech@ptg.org
> Subject: Re: glueing controversy
> Date: Monday, September 15, 1997 1:14 AM
> 
> Richard Moody wrote:
> > 
> > Since no one has mentioned it, I have heard that another
> > consideration for using hide glue for hammers is that not as much
> > moisture is absorbed into the hammer shank upon drying.  That the
> > water soluble liquid "white" glues including tight bond dry by
> > evaporation and absorbtion of water from the glue to the wood. 
This
> > could cause warping or twisting of the hammer shank.  
> 
> Richard,
> 
> So does animal hide glue. The solvent for hide glue is water.
> 
> --ddf 

True but also there is the heat factor.  This may mean there is more
evaproation than absorbtion in hide glue. By deduction, less
absorbtion into the wood, less effects from moisture increase in the
wood. However research might  find absorbtion rates and resulting EMC
(equalized moisture content) in wood of the different glues. Until
then I bet that hide glue gives less moisture to wood than the cold,
water soluble glues. Of course that still might not make enough of a
difference to matter. ( I bet on that also)

rm