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<DIV><FONT face=Arial size=2>Tom,</FONT></DIV>
<DIV><FONT face=Arial size=2> There are a few =
different
schools of thought concerning the actual purpose of the ivory glue =
wafer. For
starters the wafer is a thin piece of muslin cloth and this makes the =
ivory
appear white, ivory is translucent and the wafer shows through. The =
wafer also
works as a medium for holding glue, wood is porous and readily absorbs =
glue,
ivory is porous and absorbs glue also. So this wafer holds a fair amount =
of glue
to prevent a glue starved joint. Finally some believe that the wafer =
acts as a
expansion joint between the ivory and the keystick. I'm not to sure this =
theory
of an expansion joint is sound. Keys and their tops do change
dimensionally and at different rates with climate changes but ivory was =
and
still is today glued on with hot hyde glue. Hot hyde glue has excellent =
creep
and rigidity resistance so this property lessens that theory if the =
wafer is
saturated with hyde glue. Mike Morvan Blackstone Valley =
Piano</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>
<A title=tcole@cruzio.com href="mailto:tcole@cruzio.com">Thomas =
Cole</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A =
title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">Pianotech</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, February 02, =
2005 1:57
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Acrilykey vs glue
wafers</DIV>
<DIV><BR></DIV>Does anybody know why glue wafers are used, other than
providing a white underlayment? Are they a buffer between the brittle =
ivory
and expanding/contracting keystick?<BR><BR>Tom Cole<BR><BR>Joe Garrett =
wrote:<BR>
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<DIV><FONT face=Arial size=2>Acrilykey is not a "glue"! Itr will =
break down
w/age and impact. Actually, so will glue wafers! The best glue to =
use for
replacing Ivory, is PVC-E that has a lot of Titanium Dioxide, (ultra =
fine),
added for the "whitening" effect.</FONT></DIV>
<DIV><FONT face=Arial size=2>Best Regards,</FONT></DIV>
<DIV><FONT face=Arial size=2>Joe Garrett, R.P.T.<BR>Captain, =
Tool
Police<BR>Squares R =
I</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>