My understanding, Ecoat stands for electro coating of pure silver over 925,
but anti tarnish is a lacker based clear liquid .I am forced to belive that
anti tarnish itself changes color, so it needs to be removed prior
polishing.
I have never used methelene chloride.
it sounds like a kind of solvent.
My jeweler supplier never heard about it.
Have you used it? from where to get it?
by the way I hate to see manufacturers rhodium plates over silver.
it eliminates oxidation but whenever consumer returns an item to polish
because the surface used and rhodium gets darker it is a big headache. I
hate to polish these items.

"Ted Frater" wrote in message
...
George wrote:
Hi.
I have repair shop that I have established since 1982, and I have
encountered many difficulties.
but I need a technical answer about silver oxidation.
Recently I have received many silver items to polish, some of them with
Ecoat, antitarnish, Ecoat with antitarnish.
usually I deep them into potassium cyanide (commercial grade) and it does
the job to remove oxidation, like chains, rings, etc. but these items
they
even resist to cyanide, I am doubting about anti tarnish that aged to a
point that itself changed the color, and prevent cyanide acid to do it's
job.
Need to hear your experience about this issue.
George.


If Ecoat? is some sort of lacquer based cover painted on, the youll need
to strip it off with say methelene chloride.

If however its say rhodium plating then a rhodium plating stripper will
be needed.
Dont know of one myself. yuoll have to look it up on google.