<HTML><FONT FACE=arial,helvetica><FONT SIZE=2>In a message dated 4/20/01 10:13:26 PM Central Daylight Time,
<BR>stephen_airy@yahoo.com (Stephen Airy) writes:
<BR>
<BR>
<BR><BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Is there any way to glue it back on or should I
<BR>replace it?
<BR>
<BR>btw it's note A#-26 on my Ricca & Son 56" upright. I
<BR>got a couple strings spliced, and plan to glue some
<BR>ivories back on & level the keys, and I'm in the
<BR>process of filing the hammers.</BLOCKQUOTE>
<BR>
<BR>If it is still fairly soft, you can just glue it back on. If it is hardened
<BR>or disintegrated, you'll need to replace it.
<BR>
<BR>Replacing with new material may seem like the best choice and a simple matter
<BR>but it really can cause a complex chain reaction of problems. New material
<BR>is likely to be of a different size. Even a difference you can barely detect
<BR>may cause the damper to lift too late (or possibly too early). If you are
<BR>not yet very skilled at adjusting damper wires and/or spoons, just one damper
<BR>replacement can be a big problem.
<BR>
<BR>For a routine regluing of a damper felt which has simply fallen off or been
<BR>torn off by handling, you can use a commonly available white glue such as
<BR>Elmer's Glue All or the Yellow Carpenter's wood glue either by Elmer's or
<BR>Franklin Titebond or any other similar product. They all have a long shelf
<BR>life and are cheap and non toxic. Simply apply a dot of glue to the area
<BR>where you can see that the original glue was and with the action in place,
<BR>lift the damper lever and slide the damper in so that it's position matches
<BR>the others.
<BR>
<BR>In a few minutes, it should be holding. The position of the damper can be
<BR>adjusted within the first few minutes of glue application. The glue bond
<BR>will be well set in about 30 minutes and completely cured within a few hours
<BR>(under normal room temperature and humidity conditions).
<BR>
<BR>To reglue your ivories, I recommend that you use that same white or yellow
<BR>glue but in combination with Cyanoacrylate Glue (CA Glue) (Also known as
<BR>"Super Glue" and sometimes "Crazy Glue").
<BR>
<BR>CA glue does not dry the way most other glues including the white or yellow
<BR>glue do. It goes through a chemical reaction. There is a commonly used
<BR>catalyst or accelerator, often called "Zip Kicker" which is the solvent,
<BR>1,1,1 triclorethylene, a very toxic chemical. Not only is it toxic but in
<BR>the case of regluing ivories, it makes the glue cure too fast, giving you no
<BR>time for adjustment and weakening the bond to where it may not hold well.
<BR>
<BR>It was discovered a few years ago that common white or yellow wood glue can
<BR>act as the necessary catalyst but a little more slowly than the toxic
<BR>solvent. It seems an unlikely combination, even an incompatible one if you
<BR>were to wager a guess but the fact is that it works very well and will not
<BR>discolor the translucent ivory.
<BR>
<BR>Simply spread a very thin layer if white or yellow glue in the key surface,
<BR>then similarly, spread medium or thick CA glue on the ivory piece to be
<BR>glued. Align and press firmly with your fingers for about 30 seconds and
<BR>release. After a few minutes, clean off any squeeze out with a sharp knife
<BR>blade. It will have congealed.
<BR>
<BR>If you have an ivory clamp, you can use it for this too. Just make sure that
<BR>your piece is absolutely straight before you let it set. It will only take
<BR>about 5 minutes clamping time to set firmly but still some hours for a
<BR>permanent cure. This means that you can work with it or leave it as repaired
<BR>after only a few minutes but that you also can break the bond to start over
<BR>if you need to for some reason within a few hours of the repair.
<BR>
<BR>Bill Bremmer RPT
<BR>Madison, Wisconsin</FONT></HTML>