Blackening Techniques For Metal - Blackening metal is a process used to create a dark, protective finish on the surface of metals. This technique is often used for aesthetic purposes as well as to provide corrosion resistance. Here are several common blackening techniques for metal: - Cold Blackening 1. Process: Involves applying a chemical solution to the metal at room temperature. 2. Advantages: Simple to use, no need for heat, and can be done with minimal equipment. 3. Disadvantages: Less durable than hot blackening, may not provide as much corrosion resistance.