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 Re: Oxidized hard rubber
Author: Lelia Loban ★2017
Date:   2010-09-13 13:35

Another approach with plastic or rubber that turns brownish or greenish is: just leave it that way. If the clarinet is antique or old, that's what I do. I consider the discoloration "fair wear." It doesn't affect whether or not I buy a used instrument, unless the color change is severe and on only one side of a hard rubber clarinet.

If I see discoloration only on the upper side that's exposed with the case open, I take it as a sign that a flea market vendor has left the clarinet exposed to the hot sun for hours on end. In the Washington, D. C. area, where daytime temperatures can stay in the 90s for more than 50 days per year (as happened this summer), this type of discoloration means the rubber may have been heated enough to cause warping. Sometimes heat warping is grossly obvious (banana-shaped clarinet: bad), but sometimes it's subtle and the drastic color change on only one side is the only telltale. Since the flea market clarinet is almost never in playable condition, I can't check to see whether there's damage that will affect intonation, so I pass up that instrument.

Lelia
http://www.scoreexchange.com/profiles/Lelia_Loban
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