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topic 4146

How to do gold electroforming


(2001)

Dear Sir:

I would appreciate to know about gold electroforming (solution, operating condition, the electroforming technology, current density, bath, brighteners, and so on). I saw in the papers that all the bath are cyanide gold. I have the question about the dangerous of its, and what care you must have. Are there other bath of non cyanide gold I could use free maintenance?

Sincerely yours,

Zulema Angela Mahmud
- Buenos Aires, Argentina


(1999)

our company is interested to go into 14 K gold electroforming but we don't know the technology and the chemistry needed to make the solution. we also want to make gold potassium cyanide converted from 24 K to 14 K. Can we melt a 14 k gold using nitric acid and muriatic acid? If so what is the percentage. also what is the anode that we must use for the gold electroforming?

heide l. cardenio
- Metro Manila, Philippines


(1999)

Hi Heide l. Cardenio

Gold electroforming is a long process, anyway I will suggest to begin with 18 K gold electro forming where the technology knowledge is fairly established.
Process
Mould preparation using low melting alloys
Cyanide copper plating
Bright acid copper plating
ELECTROFORMING

Giuseppe Pappi
- Vicenza Italy


(2000)

Heide, The best electroforming I have seen is a process from Degussa in Germany. In this process the models are simply the waxes used for investment casting which are coated with a conductive coating then electroformed in the carat rating required. The process is however sold as a package that is you have to buy the machine with the computer controller as well as the plating processes.

Regards

bob lynch
Bob Lynch
     plating company
Sydney, Australia




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