Metal etching and engraving are processes used to create designs, patterns, or text on metal surfaces. These processes involve removing a small amount of material from the surface of the metal to create a permanent mark.

Metal etching involves using an acid or chemical solution to create a design on the surface of the metal. The metal is coated with a resist material, which is then exposed to the acid or chemical solution. The areas of the resist that are not protected by the design dissolve, leaving the design etched into the metal.