• June 21, 2024
  • Shatou, Changan, Dongguan, CN
Laser Marking

What is Laser Marking: How It Works and Types

Laser marking, also known as laser engraving, laser marking, or laser marking, is a technology that uses laser beams to mark and mark the surface of objects. It has the advantages of non-contact, non-polluting, high-speed, high-precision, etc., and is widely used in electronics, automobiles, medical equipment, jewelry, food packaging and other fields.

This article provides a detailed introduction to the working principle and types of laser marking.

How Laser Marking Works

The working principle of laser marking is to use the powerful energy of the laser beam to evaporate, peel off or chemically change the material on the surface of the object, thereby forming a visible or perceptible mark on the surface of the object. Specifically, the laser converts electrical energy into laser energy, and then focuses the laser light through a lens or mirror block, so that the energy of the laser beam is highly concentrated on a small point so that it can interact with the surface of the object.

Several common types of laser marking

1. CO2 laser marking

Using CO2 gas as the activation medium, it can generate a continuous working laser beam, which is suitable for marking non-metallic materials, such as wood, leather, glass, etc.

2. Fiber laser marking

Using fiber laser as the light source, it has high beam quality and small size, which is suitable for marking various materials, especially metal materials.

3. Nanosecond laser marking

Using a nanosecond pulse laser, it is suitable for marking that requires high precision, such as two-dimensional codes, micro characters, etc.

4. Ultraviolet laser marking

Use ultraviolet laser beams to etch the surface of objects, which has the characteristics of high resolution and high precision, and is often used in the manufacture of microelectronics and precision instruments.

5. Green laser marking

Use the laser beam generated by the green laser to mark the surface of the object, which is suitable for high-speed and high-quality marking of plastics, rubber and other materials.

6. Femtosecond laser marking

Use ultra-short pulse laser to engrave the surface of objects, which has the characteristics of high precision and low secondary thermal effect, and is often used for marking brittle materials such as glass and ceramics.

Precautions for laser marking

1. Safety protection

Laser marking is a high-energy light source, and you need to wear appropriate protective glasses when using it to protect your eyes from laser damage.

2. Avoid direct exposure

The laser marker should be placed in a safe place to avoid direct exposure to the human body or other flammable objects. When working, the operator should not look directly at the laser beam.

3. Prevent false triggering

Before operating the laser marker, confirm that all operation switches are set correctly, and pay attention to ensure that the laser will not be triggered by mistake.

4. Ensure a stable platform

Laser marking usually needs to be performed on a stable platform to prevent inaccurate marking due to vibration or movement.

5. Attention to the surrounding environment

Laser marking needs to be carried out in a relatively clean environment to avoid dust or foreign matter entering the equipment, affecting the marking quality, or damaging the equipment.

6. Temperature control

The laser marker is sensitive to the ambient temperature and should be kept within the specified working temperature range to prevent the laser marking effect from being affected by the temperature being too high or too low.

7. Maintenance

Regularly clean the dust and dirt inside and outside the laser to ensure the normal operation of the equipment, and pay attention to replacing the accessories whose service life has expired.

Please note that the above are only precautions for general laser marking, and specific operations and safety measures need to be carried out according to the instructions and specifications of different equipment.


Laser marking is an efficient, precise and flexible marking technology with a variety of working principles and types to meet the needs of different materials and applications. With the development of science and technology, laser marking technology will continue to promote the development of industrial automation and intelligent manufacturing.



Which materials can be laser marked?

Many different materials can be laser marked, including: metal, plastic, wood, glass, ceramics, leather, foam, rubber, paper, and fabric, among others.

How deep is laser marking?

The depth of laser marking is between a few microns and a few millimeters.

Are laser markings permanent?

Laser marking is a permanent marking method that usually cannot be removed directly.

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