ANNEALING LASER MARKING

Annealing marking refers to an oxidation process of applying heat to a surface material. This type of Laser Marking generally results in a solid black mark with a smooth finish, but based on the temperature at the surface of the mark, colors can also vary between shades of yellow, red, and green

This process is typically slower because the annealing relies solely on heat to bring carbon from the metal to the surface and make the markings. Once the metal is heated, you must also allow it to gradually cool.