On Saturday I will participate in a market but all of my sterling silver necklaces tarnishes to brown color within 20 minutes. Please help!
I have worked as a silversmith for 10 years but never encountered this problem earlier. My newly made jewelry tarnish to a brown color within 20 minutes. It goes away with polishing dip, as usual, but it only delays the tarnishing. I bought the Sterling Silver from a retired silversmith. There is no sulfur or chlorine in the air since no other jewelry tarnishes. The silver wire is not soldered but melted to drops that has been mounted together. I have grinded and polished all fire stain after this, but oxidation occurs throughout the silver, mostly att heated areas but a bit slower in those parts that has not been melted. This is a necklace model I use to manufacture the same way without problems.
6 months ago I had the same problem with a hollow bracelet made from sheet (soldered, not melted). It became completely brown within 30 minutes. For that I used Novaline D protection but it still tarnish within a week. Back then I assumed that there were chemical filled micro-pores in the solder producing tarnish since it was concentrated around soldered areas.
But I don´t think this is the case now since the silver isn´t soldered. My only idea is to rise fine silver by deplete gilding but the design will make this difficult and I don´t know if it will work. But I would wery much like to know what happens.