Water welding machine, is it used to process gold and silver jewelry now, not that kind of coal oxygen welding? What are the advantages?

The water welding machine you mentioned should be a machine for welding by electrolyzing water to produce a mixture of hydrogen and oxygen. The flame temperature is very high, and it is mainly used for processing platinum. Generally not used for processing gold and silver. When you say coal-oxygen welding, do you mean a welding torch using liquefied petroleum gas and oxygen? It is very cheap to use, because the flame contains carbon, which will affect the toughness of platinum. Water welding machine is expensive, because the flame does not contain carbon, it will not affect the characteristics of platinum, and combustion will not produce carbon dioxide, so the working environment is good.