I've had a recent problem with my tumbler. I'm doing nothing
different than I've ever done in the past. Up till a week ago it
was fine. I'm using stainless steel shot, Palmolive liquid and
water. For some reason, the jewelry is turning black. Any thoughts?
Do you have a black barrelled tumbler? It may be that your barrel
has reached the end of it's life....and the rubber has begun to
decompose and deposit the gunk on your pieces..
Also I don't know about using dish soap in the tumbler either- (I've
always used burnishing soap) it's possible that the soap has an
ingredient that eats the rubber after repeated "scraping" of shot
I would try to clean out the barrel extra well and rinse and strain
the shot as well as possible.( do this after every big tumbling run
as well) Then start again with a clean water/soap mixture with a new
piece of silver (one without the "black residue) and see how it
goes.... If you end up with another black piece of silver it may be
time to buy a new barrel..
Hope this helps!-
Ciao- Maureen Brusa Zappellini (Tucson AZ)