Klarinet Archive - Posting 000295.txt from 2009/02

From: X-BakerBotts-MailScanner-tom.henson@-----.com
Subj: [kl] Cork Repair & Wax
Date: Thu, 12 Feb 2009 16:03:33 -0500

Hello all,

Equipment is often discussed when in need of how to repair something,
like the recent thread on a good fix for a cork that is a little loose.
While Teflon tape is a good and fast repair, something that has not been
mentioned that I feel is also a more permanent fix until a new cork can
be put on is this.

Clean all the cork grease off of the cork first using a damp soft rag.
Dampen the cork with some water using the same rag, Q-tips, or just with
your mouth. Now, while the cork is still wet, heat up a pad spatula
using a heat source until it is hot, but not so hot you can not hold it.
Then apply the smaller end around the cork with just a light pressure.
You will see steam coming up as the water evaporates. Do this all the
way around the cork and now you will find the cork has opened up the
grain and swollen up. Now, with the grain open, use the same pad spatula
and heat it up again. Rub the hot spatula on a block of paraffin wax and
then apply the wax onto the cork while still in a liquid state. Do this
all the way around the cork. It does not take a lot to work this into
the cork, so use sparingly. Then wipe off the excess with your fingers
or the same damp rag.

This will have two benefits. First, the cork will be thicker and will be
tighter in the socket. Second, the wax will impregnate the cork and also
add some thickness. The other benefit of the wax is that it helps to
lubricate the cork when assembling the instrument, but more importantly,
it makes a better seal against any air leaking out from the socket and
tenon. Most of the custom makers that I know use this wax on a regular
basis and it really does work. Morrie Backun is one that uses this even
on new corks when he does overhauls.

Tom Henson

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