 The Clarinet BBoard
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Author: Garth Libre
Date: 2014-01-18 18:46
Morrie Bakun recommends using applications of paraffin melted with a hair drier to tenon corks. He says that even tenon corks that don't rock and appear sufficient can show leaks on a pressure gauge because of the porosity of cork in general. Is this really a good idea? It seems that maybe removing the cork grease before applying melted paraffin would be preferable. This seems like a novel and direct solution to leaks, even those that are undetectable when each section of the clarinet are measured separately.
Garth, 305-981-4705. garthlibre@yahoo.com
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Author: MichaelW
Date: 2014-01-18 14:45
Traditionally stag tallow was used as cork grease. I suspect modern cork greases for the most part consist of petrolatum (Vaseline), that is a paste- like paraffin (a hydrocarbon compound) with a relatively low melting point. Does Mr. Backun mean that a paraffin with a higher melting point- more waxy- that had to be warmed up before application would improve tightness and durability of the tenon sealing?
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Author: BobD
Date: 2014-01-18 15:11
First of all the paraffin (Home Canning wax) is applied to newly replaced corks. I myself simply rub the paraffin into the new cork in solid form. I think this is an "old" Tech. procedure and helps keep cork grease away from the cork cement.
Aha, that cork grease smell of old that I loved from the little round tin was due to stag tallow. It's embedded in my memory along with Country Gardens and Gobsticks.
Bob Draznik
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Author: rtmyth
Date: 2014-01-18 16:42
Perhaps there are other leaks of about the same magnitude, which most of us cannot detect or measure.
richard smith
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Author: Caroline Smale
Date: 2014-01-18 21:51
In nearly 60 years of playing and 20+ years of repairing I have never heard of a reasonably well fitting and greased tenon cork leaking through the cork, porosity or not.
The pores of the cork will run vertically down the thickness of the cork and not lengthwise along it's length anyway.
What sort of "pressure" is being used!
Blowing through an open ended clarinet cannot possibly create more than a miniscule pressure.
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Author: Garth Libre
Date: 2014-01-18 22:03
There's a youtube video of Mr Bakun using some kind of positive pressure machine that measures leak down on positive input rather than vacuum. The video comes up under Bakun "Finding your inner leak"
Garth, 305-981-4705. garthlibre@yahoo.com
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Author: rtmyth
Date: 2014-01-18 23:42
Beats me how the physics sustains the thoughts.
richard smith
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