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Q&As since 1989


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Gold electroforming

can any one give me formula for gold electroforming to give me more than 800 microne I have gold bath solution from citric acid and potassium citrate and cobalt sulphate and indium sulphate and gold potassium cyanide but very slowey in thickness thank you

Majed Janineh
- Beith Lehem Palestain
September 10, 2011

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October 30, 2011

I am not sure how efficient or fast this solution is, but I believe it is claimed to be quite poor (20-30%).

Potassium gold cyanide          KAu(CN)2             8.8 g/l

citric acid                      C6H8O7              25   g/l

Potassium citrate               K3C6H5O7            80   g/l

Cobalt sulphate                 CoSO4. 7H2O         43   g/l

EDTA (Sodium salt)                                  15   g/l

Indium sulphate                 (In2(SO4)3)          1.8 g/l


pH                                                   3.2

I also believe the deposit loses its brightness after about 10 microns.

Trevor Crichton
R&D practical scientist
Chesham, Bucks, UK