Red Rot

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JCBone
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Red Rot

Post by JCBone »

I noticed that there are a bunch of tine redish pinkish specks with white centers on my bell. Is this red rot?
Bonearzt
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Re: Red Rot

Post by Bonearzt »

Probably not.

Red rot has dark red/maroonish centers, and is usually found in the crooks where moisture tends to sit.
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harrisonreed
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Re: Red Rot

Post by harrisonreed »

A picture is worth a thousand words
JCBone
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Re: Red Rot

Post by JCBone »

harrisonreed wrote: Tue Feb 09, 2021 3:29 pm A picture is worth a thousand words
I'll try to attach one but I'm not sure that my cheapo phone camera will be able to pick it up
JCBone
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Re: Red Rot

Post by JCBone »

This is the best I could get
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harrisonreed
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Re: Red Rot

Post by harrisonreed »

That looks like scratches and pitting, but definitely doesn't look like red rot.
JCBone
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Re: Red Rot

Post by JCBone »

I'm specifcally talking about the 2 large spots that appear kindof red
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harrisonreed
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Re: Red Rot

Post by harrisonreed »

It looks like a scratch (blue line) that flaked a bunch of lacquer off with it (yellow). Is there at texture difference at that spot?
Screenshot_20210210-075807.png
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JCBone
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Re: Red Rot

Post by JCBone »

harrisonreed wrote: Tue Feb 09, 2021 4:03 pm It looks like a scratch (blue line) that flaked a bunch of lacquer off with it (yellow). Is there at texture difference at that spot?

Screenshot_20210210-075807.png
yes. there is a texture difference
hornbuilder
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Re: Red Rot

Post by hornbuilder »

It isn't red rod. The lacquer has been compromised, by a scratch. It probably won't get any larger, and is not really an issue. Difficult to repair without doing a complete respray.
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tbonesullivan
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Re: Red Rot

Post by tbonesullivan »

Looks like a possible bit of acid bleed, or something similar. I believe red rot is not really something that occurs on bells very often, if at all. It's really something that happens in the areas of the trombone that stay wet, like slides, crooks, and such.
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hornbuilder
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Re: Red Rot

Post by hornbuilder »

Right, this is more "acid bleed" than red rot. The acid in this case is not from flux, but from the environment the horn lives in. Even just humidity can cause such a discoloration.
Matthew Walker
Owner/Craftsman, M&W Custom Trombones, LLC, Jackson, Wisconsin.
Former Bass Trombonist, Opera Australia, 1991-2006
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