Hello, I have consistently been having a problem post tumbling
that consists of a brown filmy type of residue that appears about
2-3 days after my final tumbling in porcelain is complete.
Alan, In order to attempt to answer this question I must first ask a
couple. What metal are you finishing? Are you using the same media
to finish gold and silver? During your mass finishing process, do
you use carbon steel either on your parts or in the same finishing
machine? I am already assuming that you are using tap water since
you question it. Renting a DI unit from culligan is a pretty
inexpensive alternative to tap water and its issues. (not a water
softener that uses salts but a DI unit).
J. Tyler Teague
(Jewelry Engineering, Training, & Technology)