I divide all my scrap into several parts.
All clean non processed material, cut offs from sheet, the bit’s of
wire I have no use for, go into jars marked by quality. None of it’s
been melted or soldered. I add this, at about 50%, to casting grain.
Dirty scrap, doubtful bits (was that a piece of solder or a piece of
18ct yellow?) filings, bench sweepings, already soldered, filings from
mixed metal jobs and rejected bits (like jump rings, settings from
scrap that I’m not sure are gold or silver and so forth) go into gold
or silver jars marked “Au mix” and “Ag mix.” These get sent on to the
refiner with different instructions. It’s a lot cheaper to have the
"Ag mix" sent in just for silver recovery but it’s a mistake to allow
too much gold to get mixed in with it.
Every so often I’ll send in the filters from the dust collectors, the
carpet and the slurry from the settlement tank in.
I actually end up with very little real “scrap.”