What are the common laser marking methods?

Laser marking technology achieves permanent and high-precision marking by interacting with materials in different ways. Below is a detailed introduction to several main methods:

Laser Engraving 

This method uses a laser beam to carve marks of varying depths on the material surface. It is suitable for a wide range of materials, including metals, plastics, wood, glass, and ceramics. Key features include controllable depth and rich detail, making it ideal for high-precision and three-dimensional marking.

Laser Etching 

This technique involves localized removal or melting of the material surface with a laser to create permanent marks. It is primarily used on metals, plastics, and glass. The marks are delicate and smooth, particularly suited for designs with complex details.

Laser Coding 

This process quickly forms standard marks such as characters and barcodes on material surfaces. It is applicable to metals, plastics, and ceramics. Characteristics include high speed, clear and durable marks, making it excellent for mass production.

Pulsed Laser Spot Welding Marking 

This approach employs pulsed lasers to spot-weld two points on the material surface for logos or decorative marking. It is mainly used on metals and offers high precision, ideal for specialized marking needs.

Laser Ablation 

This method removes or strips the material surface with a laser to form marks. It is suitable for glass, metals, and ceramics, providing depth control and long-lasting results with strong durability.

Laser Modulation 

By adjusting laser parameters, this technique achieves varied marking effects on diverse materials. It can produce grayscale, color variations, and other diversified marks, offering high flexibility.

These methods can be flexibly selected based on material and requirements. Overall, laser marking offers advantages such as non-contact operation, no consumables, environmental friendliness, high efficiency, and permanent durability.