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Greeninsh Color with Magnetic Polishing


#1

Whenever I get gold jewelry magnetically polished and I find it
becomes greeninsh in color. Why does this happen?

Thanks
Rahul


#2

Rahul, I can think of two possibilities: Most probable

  1. Your pins are rusty! The steel cannot be completely stainless or
    they wouldn’t be magnetic. You can clean them with a little coca cola
    in water (about 1:10 ratio coke to water) run the solution for 20
    minutes or so, rinse thoroughly and change your normal solution more
    frequently.

  2. Somehow your alloy is reacting with your tumbling solution, ask
    the manufacturer for the right soap for the pins and do change the
    solution frequently

Good luck, Bruce Morrison


#3

Rahul,

Be sure that your shot is clean before you run. And be sure to use
fresh cool water and soap each time you run a batch. Some one once
compared it to a washing machine you would never re-use the dirty
water to wash clothes.

We supply a shot cleaner (750 compound ) as well as many types of
soap for the tumbler - different soaps work better on different
alloys There is a blue liquid that works well on platinum and a white
powder soap for yellow gold, some people even combine them - it seems
everyone has there own formula. But the more lubrication from the
soap the better and quicker the pieces will come out.

Ruth
Romanoff International Supply
1-800-221-7448 ext 110


#4
Your pins are rusty! The steel cannot be completely stainless or
they wouldn't be magnetic. You can clean them with a little coca
cola in water (about 1:10 ratio coke to water) run the solution
for 20 minutes or so, rinse thoroughly and change your normal
solution more frequently. 

Stainless steeel can be either magnetic or non-magnetic depending on
the alloy.

http://www.physlink.com/Education/AskExperts/ae546.cfm