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Cyanide-free silver plating for hotel EPNS wares
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Please show me the way to a cyanide free silver plating for hotel epns wares.
thank you
silver plating on hotel EPNS Wares - Hyderabad, India
+++++Simple cyanide free silver plating bath:
40 gm silver chloride
200 gm potassium ferrocyanide (1% of potassium cyanide toxicity)
20 gm potassium carbonate
1 lit water
stainless steel or silver anodes
60-80° C,10-15 A/sq.ft
According to Fischer,Weiner Precious Metal Plating, Teddington 1964.
Or you can use pyrophosphate bath:
Goran Budija
100 gm potassium pyrophosphate
25 gm ammonium carbonate
25 gm silver pyrophosphate
1 lit water/SS anodes
According to Galvanotehnika blagorodnih I redkih metalov (Electroplating of precious and rare metals),Leningrad 1970.
Good luck!
- Zagreb, Croatia
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Dear Goran, I would like to thank you for this response.
The mentioned process landed me in some trouble.
I would be thankful if really there exists silver plating without cyanide.
Regards and thank you.
silver plating on hotel EPNS Wares - Hyderabad, India
++++++Just last week I attended a presentation on "Alkaline Non-Cyanide Silver" by Eric Olander of EPI, Ravindran. Cyanide formulas still account for 95 percent of all silver plating, and there is no decorative non-cyanide formulation as good looking as cyanide silver because no brighteners are compatible. But maybe you could try their non-cyanide silver and see what you think.
Ted Mooney, P.E.
finishing.com
Brick, New Jersey
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Dear Ted,
Thank you for the information.
So it is all a hoax that a non cyanide silver plating ever exists.
Then what is available other than the ferocious cyanide based silver plating,because it was the world body from USA who had come to Delhi etc in 1999 and successfully paved the way for the closure of all the plating units based in the star hotels without giving any alternative. The stainless steel cutlery etc seems more of a large open air dining outlet, there is no glamour which otherwise existed in the hotel even if the service was not good.
Regards.
ravi
silver plating on hotel EPNS Wares - Hyderabad, India
++++++Dear Mr. Ravi,
You make reference to events that I unfortunately have no knowledge of, such as this world body from USA visiting, and electroplating within the star hotels, etc. But maybe I can guess that these hotels formerly did their own cyanide silver plating in-house and someone decided that it was not safe for hotels to have cyanide on site?
Certainly there are electroplating jobshops in your area who can do cyanide silver plating of silverware at their shops. This would allow you to once again use fine silver service without exposing the general public to dangerous industrial processes that only trained professionals should have to deal with. Despite my ignorance of what went on, I do feel that when hotel guests lie down at night, they should not need to worry that industrial processes that can release deadly gasses may be in progress within the hotel. Good luck.
Ted Mooney, P.E.
finishing.com
Brick, New Jersey
April 9, 2011 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread
Dear Sir,
I have a small factory making religious silver icons from pure silver 999, I also have a line of copper icons (small and large) and I am looking for a simple silver plating solution.
I was wondering if I can use single silver powder with a stainless steel anode, and if yes, what is the solution composition.
Thank You.
business owner - Bethlehem, Palestine
April 11, 2011
Hello, cousin Elias.
As you see, we have appended your question to a thread that may answer it for you. While we greatly appreciate Goran's effort to find a simple cyanide-free silver plating solution for us, it appears to me that a truly satisfactory one doesn't actually exist. Good luck.
Regards,
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 Ted Mooney, P.E. finishing.com Brick, New Jersey |