Laser Marking Discoloration Contamination

After laser marking, oxidized surface layer forms on metal surfaces because heat exposure accelerates oxidation during engraving. This contamination shows unique localized discoloration and texture that distinguishes it from uniform rust buildup in other processes, and behavior varies so on steel and titanium stronger adhesion occurs while on aluminum and brass looser attachment allows easier detachment. Key removal challenges arise from potential substrate damage during cleaning, yet laser cleaning proves effective because selective energy pulses ablate oxide precisely so underlying material remains intact.