What are the methods of gold polishing? Does it effect in any way in terms of weightage of gold?
Gold can be polished in two different methods. 1. Hot Process: Hot process is also known as Electro plating process. In this process 24 Karat-gold sheets are attached to the anode end and gold ornament which is to be polished is attached to the cathode end. When these electrodes (cathode and anode) are dipped in a container filled with potassium cyanide, 24 Karat Gold in the anode melts. Because of attraction, the gold gets attached to the surface of gold ornament in the cathode. It means 5 to 6 microns of gold layer gets attached on the ornament surface. In this way gold ornaments are polished. 2. In this process the weight of the ornament remains the same. 1 Milligram = 1000 micros. Diagram Hot Process Cold Process: When a gold ornament which is to polished is dipped in a liquid called Aqua regia, the gold melts in the liquid. The outer layer of the gold melts and we can see the inner layer.
