Black marking is a procedure in laser processing which causes extremely dark, high-contrast marks on a surface without material ablation. Extremely short laser pulses reason structures on the surface at the nanometer level.

• High difference and dark black in color
• Permanent, corrosion-resistant and non-fading dark marks
• Machine readable
• Shallow surface relief so as not to retain bacteria
• No passivation step required after marking
• Black laser marking is most often used in the medical device industry in order to meet UDI (unique device identification) requirements. Black laser marking is top achieved using a picosecond laser marker.