Laser Black Marking: High Contrast Marks on Metals and Non-Metals

Dark laser marking, also known as black marking or black annealing, uses a laser to create a black mark on the surface of a material without removing the material or damaging the substrate. The process is commonly used on metals, plastics, ceramics, and silicone.

Which materials will be blackened using laser?

Laser Black Marking Stainless Steel

Black marking is durable, resistant to abrasion and corrosion, which is suitable for a variety of industrial applications including part identification, brand identification and compliance marking. In the field of stainless steel processing, laser marking black on medical devices is the most typical case. Ultra-short pulse laser marking black can provide safety markings that comply with medical regulations and meet the requirements of corrosion resistance, deep black, high contrast, fineness, durability, etc.

Fiber Laser Dark Marking Anodized Aluminum

Black laser marking on anodized aluminum requires the use of specialized MOPA fiber lasers to create high-contrast markings. The MOPA fiber laser marking machine can precisely control the pulse duration and frequency. When the laser causes local heating on the aluminum oxide surface, resulting in changes in the material structure or oxidation state, permanent, wear-resistant black marks will eventually be produced. Aluminum oxide laser blackening has become an ideal choice for marking industries such as electronics, medical equipment and industrial components due to the high-quality marking results.