Letter 35019

Cyanide free silver plating for hotel epns wares [India] 

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Please show me the way to a cyanide free silver plating for hotel epns wares.
thank you

C.K.Ravi
plating shop - Hyderabad, India

Simple cyanide free silver plating bath:
4o gm silver chloride
2oo gm potassium ferrocyanide(1% of potassium cyanide toxicity)
2o gm potassium carbonate
1 lit water
stainless steel or silver anodes
6o-8o C,1o-15 A/sq.ft
According to Fischer,Weiner/ Precious Metal Plating , Teddington 1964.
or you can use pyrophpsphate bath:
1oo 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!

Goran Budija
- Zagreb, Croatia

I would like to thank you for this response. Delay was due to not opening the site.
Regards.ravi

C.K.Ravi
silver plating on hotel EPNS Wares - Hyderabad, India

Dear Mr.Goran,
Thank you indeed.
The mentioned process landed me in some trouble.
I would be thankful if really there exixts silver plating without cyanide.
regards and thank you.

Ravindran
freelance - Hyderabad

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 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 Inc. - Brick, NJ

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

ckravi
freelance - hyderabad

Dear Mr. Ravi,

You are making reference to things that I unfortunately have no knowledge of, like this world body from USA visiting, electroplating within the star hotels, etc. But maybe I can guess that these hotels formerly did their own cyanide silver plating and someone decided that it was not safe for hotels to have cyanide on site.

Certainly their are electroplating jobshops in your area, however, who can do cyanide silver plating of silverware at their shops. This would allow you to once again use fine silver service without the patrons of the hotel needing to worry about dangerous industrial processes being conducted within the hotel.

Ted Mooney, P.E.
finishing.com Inc. - Brick, NJ

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