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Tumble polish problem


#1

Help! A while back someone refered to havingin their silver
pieces turn black when they were tumble polishing them with steel
shot. I was very smug and said it must be the cleaning compound,
it had never happened to me…well it did, a whole barrel full of
rings I was repolishing to get ready for an upcoming show. Does
this mean I need a new barrel? I have a hard rubber (or something)
black one, a very small rotary tumbler, and usually everything
comes out very bright, shiny and polished.

Well, I’m out to the polish wheel with all those rings, I would
appreciate knowing what I did wrong and once again, what do others
use as a cleaning compound. I have some stuff that looks like
powdered detergent and cornmeal.

Thanks,
Jan


#2

Jan-You could try the shot cleaner they sell at Gesswein and keep
the air off of your shot when not in use or make sure it is
completely dry and clean. Good luck!


#3

Hi Jan, Gesswein has a product called “Steel Shot Cleaner” that
will fix your problem. Follow the directions and WEAR GLOVES :o
J.A.


#4

Are you taking your silver out of the pickle withouy thoroughly
cleaning it before putting it into the tumbler? It has been
suggested that this could be the cause of the blackening.


#5

Jan,

I just saw something on one of the lists (maybe Orchid ?) about
this. I didn’t pay too much attention because I don’t do many
rings (my pendants and earrings just get scratched in a tumbler),
but… I think it was something about leaving a little bit of
pickle on the pieces that affected the shot. The solution was to
clean the shot in Coke and make sure no pickle acid was left on the
pieces. The poster said that Coke really cleaned up the shot very
well.

Nancy


#6

Help! A while back someone refered to havingin their silver
pieces turn black when they were tumble polishing them with steel
shot. I was very smug and said it must be the cleaning compound,
it had never happened to me…well it did

The outcome was that the steel shot should be tumbled for about an
hour in Coca Cola (not joking) and then rinsed and used. I now
clean my shot this way before every use.

Yours aye,
Dauvit Alexander,
Glasgow, Scotland.


#7

I got good advise from a girl at Gesswien that using Coke in one
cycle would help and it really does. It apparently is(the smudge
black stuff) is the result of reverse plating and has to do with
the PH of the solution and going from basic to acidic seem to do
the best to solve problem. Let me know if you try and works – I
know I happy with my results. Ron www.kreml.com


#8

Hello everyone. Just the other day someone put some steel in the
pickle bath, and apart from copper plating some silver I had in,
there was allot of black slimy gunge around the offending object.
This could be the same reaction. What do you mean by “coke” to
clean the steel shot in, is it the drink coke or something else?

I am planing on making my own tumbler, I have a few assorted
bearings, steel rod and acouple of electric motors. Has anyone got
ant tips on the design? be lucky, John, Manchester.


#9
   A while back someone refered to havingin their silver pieces
turn black when they were tumble polishing them with steel shot. 
I was very smug and said it must be the cleaning compound, it had
never happened to me..

G’day Jan; I suggest that you simply put the work back in the
pickle jar, or into a bottle of Goddard’s Silver Dip available
from the supermarket and they should come out not bright, but white
You may need to use hot pickle. Add some of your warmed pickle to
the the barrel and wash it round. Scrub out your barrel carefully,
without getting any pickle in cuts(!) Rinse the barrel thoroughly
with warm water, then wash the steel shot carefully. Replace
everything in the barrel and add water, a splash or two of
household detergent and a splash or two of ammonia. Spin. Beats
working on the buff! By the way, I polish sterling chain with
steel shot dry in a home-made vibro polisher and it comes out
brilliantly polished in 15 minutes. I wash out the shot and the
container (a Kodak slide box!) at frequent intervals. Cheers,

        /\
       / /    John Burgess, Nelson, New Zealand
      / /
     / //\    @John_Burgess2
    / / \ \
   / (___) \
  (_________)

#10

Hi Jan, I’m from Australia and I also have a vibrating tumble
polisher for my jewelry. My pieces on occasions go a dull
grey/black like yours have. I have read somewhere that it is the
black vulcanized rubber that causes this problem. Steel shot will
also do the same thing if care is not taken to stop it from
rusting. I have cleaned my steel shot with caustic soda when rust
has set in, this works but is a slow process. You can buy the
more expensive Stainless steel shot and it is my understanding
that it should not rust. However I have come to the conclusion
that I will have to buy a tumbler whose base is not made of black
rubber as it is a bit like playing Russian Roulette at the moment
–you can never tell when its going be black!!!.( I am looking at
the piggyback Gyrock type so that I can use the different medias
for each polishing process .) Hope this is of some help. Cheers
Marjorie.


#11
  Jan-You could try the shot cleaner they sell at Gesswein and
keep the air off of your shot when not in use or make sure it is
completely dry and clean. Good luck!<<

Two alternatives to the shot cleaners sold by many suppliers are:
Draino and lye (sodium hydroxide). Both of these are available at
many hardware stores & in the US Draino is available at some
grocery stortes.

To use either: 1, rinse off your shot with clear water; 2, add
enough wat er to almost cover the shot; 3, add aprox 2 tablespoons
of Draino or lye; 4,

put the cover on the tumbler & run for about 1 hour; 5, rinse the
shot under clear water; 6, put shot back in tumbler and add your
favorite polishing solution; 7, replace the tumbler cover.

If the shot won’t be used for a few days & is not stainless steel,
use ho t water to rinse the shot, then dry it with a bath towel &
store it dry. Ev en if it’s stainless, you may want to use this
method, as some stainless wil l rust if left in the presence of
water.

This cleaning method has worked well for me for many years.

Dave


#12

I have found that keeping my steel shot (not stainless) in a
plastic jar with water, liquid soap and ammonia keeps the shot
from rusting and from turning the silver black. Of course, it
you do not rinse it thoroughly, the ammonia will turn copper or
bronze black it you tumble it with the silver. Always keep the
water level covering the shot completely.

Iris Stuecklen
Baltimore MD USA


#13

Hello, I have purchased the Gyrock Vibratory Tumbler. The “piggy
back” philosophy is just great. Never contaminate the next step
with hidden grit from the former. I isolate each bowl for one
size grit, and as one step completes, totally clean material and
prepare in next container and piggyback. This goes through steps
1-3 concurrently. They are now selling an add on to take
advantage of the vibratory feature and enabling you to flat lap
while “tumbling”

Good Product and very good company with an excellent owner with
patience. Teresa Masters No I don’t sell them, but who knows I
might later.