prepping glue joints

[Paul]

Richard
We toured the R&D facility at Kimball back in the 80's. They had run a
series of tests on wood surfaces and bonding strengths. Their conclusion was
the smoother the surface the stronger the bond. I don't know where or how
you can get that information, but I found it quite interesting. They
recommended very sharp cutting tools that shear material not tear or
compress the wood fibers. The latter showed a marked decrease in bonding
strength. They contended they found incredible strengths with common white
glues that had proper gluing surfaces.

Paul Chick
----- Original Message -----
From: Richard Moody <remoody@midstatesd.net>
To: piano tech <pianotech@ptg.org>
Sent: Sunday, September 24, 2000 1:27 AM
Subject: prepping glue joints


>
>
> > >
> > >Well show us his scientific evidence so we can make up our own minds.
> >
> >
> >
> > For starters you can check out his "Understanding Woods" &
> > "Identifying Woods" if you want see if he seems to know something
> > about wood or not.
>
> Both of his books are available from Schaff.
> Here is another "authority"  http://www.titebond.com/default.asp  They
even
> have an 800 tech support number.
>
>
> > Aside from contamination, Hoadley noted that freshly planed or fine
> > sanded surfaces will take a much better glue joint than a "roughened"
> > or scored surface.
> >Patrick
>
> This is what I was asking for scientific (experimental results) about.
Have
> they tested the planed surfaces against the scored surfaces?  Because I
was
> taught to score some surfaces I would like to know if that practice is now
> outdated, or applicable only to  newer   glues.  ---ric
>
>
>