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 Re: Michael Lowenstern's bore oil experiment
Author: bbillings 
Date:   2018-09-11 22:17

Paul,

Demonstrated and proven are very different scientifically. Science is simply a paradigm through which we attempt to quantify natural occurrences both known and currently unknown.

I haven't seen reference to specific bore or tone hole changes in dimension though if the wood loses moisture or oil it would stand to reason that the cells of the wood shrink and therefore the dimensions must change. I think it adequate that humidity changes wood dimension or tenons would never stick or become looser and the rings on the bell wouldn't become loose since the metal doesn't change dimension. No scientific experiment required, IMO. There very well may be significant differences between pieces of wood that have more to do with cracking than humidity or oil content though it's unlikely to ever be solved.

Greenline instruments certainly shouldn't change in dimension since the glue has to be the dominant stabilizer. Although, reportedly, they have a brittleness and tendency to shatter if mistreated purposefully or accidentally. Over time will they deteriorate like other glued connections?

"Blown out" is a curious term that seems totally undefined but for some reason accepted. I'd question if any instrument could be "blown out"? Possibly just out of adjustment? Possibly the technician didn't get it back to where the performer/owner expected? Certainly Larry Naylor argued that the term was adequately described by loss of moisture and oil content of the wood. He did provide research and literature in his presentations. I hope and expect his presentations were preserved by NAPBIRT. As an interesting aside anyone who has studied botany knows that xylem in a plant takes water in through end grain (like a straw) as opposed to from the side. Possibly why Mr. Naylor used to do oil immersion for "clarinet restoration" as opposed to simply oiling the bore. Certainly, and I believe measurably, the density of the wood used to create newer clarinets is different as the old growth trees are fewer if existent at all.

Regardless, there is NO research suggesting a negative effect to oiling the bore. It is a simple procedure and there is evidence that the oil is absorbed. Cell membranes are primarily made up of lipids (I humbly defer to Dr. Henderson regarding cellular research). Further, oil absolutely would resist the humidity and saliva introduced into the bore during normal playing possibly making swabbing more effective and harmful effects of saliva less detrimental. Does it change the bore dimension? Unlikely that it could swell the bore beyond it's initial reeming but possibly could return the bore to its initial measurement or close to it if it had diminished.

My thoughts,
Brian

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