I just had almost a pound of silver ruined by some sort of solder
that did not belong there. Now how do I get it out after I made
sheet and wire with it. Every thing I make turns the wearer skin.
But there is not enough to attract a magnet.
If you actually melted it into ingots and made sheet and wire, and
it was contaminated with junk that shouldn’t be there, the metal
needs to be refined to clean it up. Send it in to your favorite
refiner, perhaps in trade for new sheet or wire, or less costly
casting grain if you prefer to make your own. By the way, tin/lead or
related solders won’t be affected by a magnet. Nickle or iron are
magnetic. Tin and lead and similar metals in those soft solders, are
not. Be sure, though, that the problem is with your metal before you
take drastic action. Is the discoloration only with one customer? If
so, try them with some commercially alloyed silver to compare. There
are some people, as with any metals, who will have a problem with
silver even when it’s not contaminated. As a general rule, I’d have
expected you to have a clue that there was a problem before you got
to the finished stage, since adding more than a trace of soft solders
might quickly have affected the ease with which you could make sheet
or wire, not to mention finished jewelry… Is it, for example,
possible that the original metal wasn’t sterling? Some old work might
have been 900 coin silver, or from some sources, even lower silver
content. Such metal, even if not contaminated might react differently
or more strongly for some people.