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Re: Brad Behn vintage review

Author: L. Omar Henderson
Date: 2010-03-16 16:52

Tobin is correct about finding many of the answers on Brad's wonderful web site. Indeed the old method of only using sulphur as the crosslinking cofactor for vulcanizing the rubber into rods was not consistent from batch to batch or from rubber maker to other makers. Today nearly all rubbers are molded and then vulcanized under heat and pressure (so were the old rubbers but molded rubbers require a different formulation than making rod rubber) and today there are better controls over heat and pressure conditions and other cofactor accelerators which make the products more uniform.

The old rod rubber machined mouthpieces have for the most part aged well as far as rubber goes if they have been stored reasonably well (away from excess heat and sunlight). We of course know that all rubbers especially the early specimens have changed over time. The nature of the cross links in vulcanized rubber dictates that they begin to break and change from the moment of manufacture. What we see in crosslinking patterns of the aged old Chedeville(TM) is an aged pattern - not the original pattern. Thanks to the automobile tire industry it is possible to accurately measure signature crosslinking patterns in rubber samples, and measuring a bunch of Chedeville (TM) samples indicates wide variation in the patterns.

It so happens that in terms of a material for clarinet mouthpieces the aged pattern produces characteristic acoustics somewhat different than modern molded mouthpieces. The physical architecture produced by expert makers such as Brad is of course the most important factor in the playability and sound of a mouthpiece.
L. Omar Henderson
www.doctorsprod.com

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Brad Behn vintage review new

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