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what is the blue junk on old strings?


(@anonymous)
Illustrious Member
Joined: 15 years ago
Posts: 8306
Topic starter  

you know what i mean. after a week or two, if you brush off the strings before you play them, a bunch of blue dirt falls off. is that a copper oxide or something?
just wondering.


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(@dogbite)
Illustrious Member
Joined: 17 years ago
Posts: 6353
 

that doesnt happen with mine.
if anything it is more black.
but yes, it is oxidation, finger grease, sweatlets, dead skin flakes, you name it
strings get full of gunk.
that is why it is important to wipe them with a soft cloth after playing.
AND changing them after twenty to forty hours of playing is a good idea. because they sound dull and tend to break with all that stuff on em.
yes, I said it, twenty to forty hours.

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http://www.soundclick.com/couleerockinvaders


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(@ricochet)
Illustrious Member
Joined: 19 years ago
Posts: 7850
 

It's copper carbonate. Usually it's green (malachite), but can be blue (azurite.)

Nickel will make a green crust when it corrodes, too.

"A cheerful heart is good medicine."


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(@misanthrope)
Noble Member
Joined: 17 years ago
Posts: 2268
 

I'd go with copper as well. Are the strings that do this bronze? Bronze is a copper alloy, so it's in there in decent quantities. You remember copper sulphate from school? Is it that kind of blue?

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(@anonymous)
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Joined: 15 years ago
Posts: 8306
Topic starter  

thanks ric.


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