Thank you for the suggestions relating to my plating problem.
My pickle was very saturated with silver, turning quite milky
with the table salt test that John Burgess suggested. My pickle
solution was over two years in concentration.
A new gold only pickle seems to have solved the problem for
solid 18k pieces. However the pieces that combine 18k and
sterling still seem to be plating in the clean pickle.
If there are any orchid subscribers in New York, please come and
see my new work at the American Craft Museum’s bennifit show -
Gold and Silver 1998, December 3rd - 6th at the American Craft
Museum, 40 West 53rd Street, NY, NY. For more call
212-956-3535. The show is featuring over 60 American and Swedish
jewelers and silver smiths.
Thanks again for the helpful advice.
Gina Pankowski @gpankowski
Original MessageFrom: John Burgess firstname.lastname@example.org
Date: Thursday, November 19, 1998 11:06 PM
Subject: Re: [Orchid] 18k and sterling jewelry is plating in the pickle!
I would say that the pickle has very likely become a
plating tank by virtue of the amount of silver that's been
dissolved in it.
G’day; Silver is not very soluble in sulphate solution.
The CRC Handbook of Chemistry and Physics gives the solubility of
silver sulphate as 0.57 grams per 100mls. Having said that, I took
a little of my well-used 10% sulphuric acid pickle and added a
few drops of sodium chloride - table salt - to it. If silver
had been present in the pickle a white precipitate would have
appeared, but there was no change in the pickle colour. This is
a very sensitive test, as silver chloride which would have
formed, is completely insoluble. I performed another test by
adding potassium chromate to the pickle. If silver had been
present I would have seen a deep crimson precipitate of silver
chromate. There was no colour change observed Now you can make
what you like from the above: the academics say that silver
sulphate is 0.57% soluble. Two different actual experiments
produced no reaction. Yer pays yer penny and yer takes yer
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At sunny Nelson NZ
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