18-Karat Gold Plating
Q. I currently do 24-karat gold plating, but now wish to do 18-karat gold plating. What do I have to do in order to do this type of plating? D.I.
A. Gold alloy plating is fairly common. In general, you have to add metal salts to the gold plating solution. Copper, cobalt and nickel salts have been classically used as additives. Today, nickel compounds are generally not used because of their potential to cause skin dermatitis and their environmental problems.
Vendors of gold plating chemistry have plating bath formulations available that can be used to plate 18 karat gold. If your vendor does not have such a formulation you can find the names and contacts of such vendors by going to pfonline.com and accessing the supplier list. This is a lot easier than trying to formulate a “home brew” plating bath.
Masking is employed in most any metal finishing operation where only a specifically defined area of the surface of a part must be exposed to a process. Conversely, masking may be employed on a surface where treatment is either not required or must be avoided. This article covers the many aspects of masking for metal finishing, including applications, methods and the various types of masking employed.
The processes, chemicals and equipment, plus control and troubleshooting.
Applications, plating solutions, brighteners, good operating practices and troubleshooting.