 The Clarinet BBoard
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Author: klarisa
Date: 2019-11-16 00:20
Something new in Selmer clarinets. No more cracks?
https://www.selmer.fr/instruinfo.php?page=NEW&famille=SELMER%20CLAR&LANGUE=en&fbclid=IwAR132X9Y6-K2DsG488whnWhk4TyKQdP1skp7NR9Vaw-ptF77vjizLwA0EUw
Post Edited (2019-11-16 00:20)
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Author: Paul Aviles
Date: 2019-11-16 01:40
Gee I'd like to hear a more detailed description than what Selmer is currently posting. It almost sounds like the plastic lining that Rossi uses for a portion of the top joint. Plastic pen barrels are often referred to as being "resin."
.................Paul Aviles
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Author: Tony F
Date: 2019-11-16 03:38
From the product description I suspect that this may not be the process of lining the joint with ebonite, but one of impregnating the wood with some form of resin under pressure and then machining the bore to size. This method of stabilising the wood has been used for many years in the furniture and floorboard industries and the technology is well known and understood.
Tony F.
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Author: Paul Aviles
Date: 2019-11-16 07:10
My brain went to that idea first, but they say the bore is sized larger. That wouldn't be necessary if the billet were treated somehow. Of course we have determined on this board that African Blackwood is so dense that even oil over a long period of "soaking" will NOT penetrate much further than the surface.
................Paul Aviles
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Author: Tony F
Date: 2019-11-16 20:09
Paul,
What I think they mean is that the upper joint bore is slightly oversized and that the resin impregnation process build up the bore surface, which is then reamed to the correct size. As for penetration, remember that oil soaking relies on the oil wicking into the wood under normal atmospheric pressure whereas the impregnation process I mention is done by first removing any air within the wood by means of a vacuum process and then applying the resin under extreme pressure. I've used this process industrially and it is extremely effective, resulting in a dense structure with the characteristics of timber but greatly enhanced wear qualities. Of course this is pure speculation and I reserve for myself the right to be wrong.
Tony F.
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Author: MichaelW
Date: 2019-11-17 22:21
Interesting that Selmer use some sort of "resin", (maybe Epoxy), with the supposedly toxic bisphenol replaced by something from "biomass", while Yamaha use the thermoplastic ABS (which, btw. is not exactly "state of the art", but used widely for decades).
Post Edited (2019-11-17 22:29)
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