What are the methods for coloring brass?

The main methods of brass coloring are traditional wet coloring and relatively new thermal coloring at present. In addition to these two methods, there are many coloring methods such as coating, electrophoresis and electrolysis. For traditional bronzes, such as Buddha statues, incense burners, ornaments, etc. Traditional wet coloring is still the main method, and the finished color film is wet and thick with rich layering. The following pictures of incense burners are for reference and discussion only.