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Removing Liver-of-Sulphur

What’s the best way to remove blotchy Liver of Sulphur, short of
sanding it off? They are components for a sculpture made out of both
copper and red brass. I did some pieces yesterday that came out
streaky and inconsistent in color. I was going for a nice dark
red-brown on the copper and a dark gold on the brass. I want to
re-do them. Will Liver of Sulphur come off in pickle? Since they are
part brass I don’t want to have to remove the pink cast on the brass
again. That was quite enough work the first time. I know about the
hydrogen peroxide pickle business but that leaves quite a mess too:
I usually sand instead. If the pickle is used cold will there still
be a plating reaction on the brass? I could always just hold the
copper parts in the pickle and try not to wet the brass.Any
suggestions?

What's the best way to remove blotchy Liver of Sulphur, short of
sanding it off? 

Tarnex brand, or other tarnish removers based on Thiorea (spelling?)
will do it.

Peter

What's the best way to remove blotchy Liver of Sulphur, short of
sanding it off? 

It comes off silver by torching (heating) it

I’m not sure whether this will be feasible for you, but gently
heating the piece with a torch will also burn off the LOS. Any
darkened remnants will easily brass brush away after pickling.

Karen Goeller

If you have to do this often, investing in an ionic cleaner would be
worth it. It removes LOS in less than a minute and leaves it shiny
white, without damaging pearls nearby. Torching it, even gently,
cannot be done as safely (to the piece) – there’s sill a dull, gray
finish (which may be what some people like). When I receive back
pieces that are badly tarnished from galleries, I clean them with my
ionic cleaner and then re-patina based on what seems to be selling.

Elizabeth

1 Like

I as well believe the ionic cleaner is like a controller
electro-cleaner. It will brighten and remove dirt, but not the
scratches, as well safe on all stones. Great item for home as well.

Andy " The Tool Guy" Kroungold
Tool Sales / Technical
Stuller Inc
Phone 800-877-7777 ext. 94194
Fax 337-262-7791

Thank you soooo much! You Save my jewels… and my nerves from a meltdown!