Can you recommend a non-gold containing alloy that can be plated as a gold substitute? Obviously, it should have the appearance of gold and be suitable as an undercoat for a gold layer. The application is decorative. S.C.
This seems to be the month for questions regarding bronze plating baths! As it turns out, there is a bronze plating bath that will give you a gold-like color and is suitable as an undercoat for gold. The formulation is as follows:
|Sodium cyanide||8-9 oz/gal|
|Copper cyanide||4 oz/gal|
|Sodium stannate||1.5 oz/gal|
|Sodium hydroxide||1.5 oz/gal|
|Rochelle salts||6.0-6.5 oz/gal|
The bath should contain between 9-12% tin and should be operated at 150-160F. Copper anodes are used, and varying the amount of copper and tin in the plating bath controls the color.