Metals are heat resistant materials, marking metals requires high-density laser irradiation. While using fiber or Nd:YAG lasers allows you to mark metals, it is not possible to create an intense, black marking on metals, ceramics or glass with a CO2 laser. With the help of marking sprays or pastes, this can easily be solved. The same conduction that works against the spot vaporization of metal is an asset if the objective is to vaporize some other coating away from the metal. Laser engraving metal plates are manufactured with a finely polished metal, coated with a paint made to be “burned off”.