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Green joint?


#1

I recently made a sterling pendant, a yin yang symbol. Today I noticed that where I sweat soldered the wire to the backplate (for the separation of the two sides in the design), there’s a green line where the solder joint is. Can anyone tell me why? Google won’t. lol.


#2

You might have pickle residue or the copper may be turning things green. Background areas can remain moist longer and that might encourage discoloring as well. Hope this helps