What is Laser Marking?

- Dec 23, 2019-

The basic principle of laser marking is that a high-energy continuous laser beam is generated by a laser generator. The focused laser acts on the printing material to instantly melt or even vaporize the surface material. By controlling the path of the laser on the surface of the material, a Graphical markers required.

Both laser etching and engraving fall under the general category of laser marking. Laser etching and engraving are similar in that they produce permanent marks created when a laser removes material from the surface of an object.


Laser engraving, which is a subset of laser marking, is the practice of using lasers to engrave an object. Laser marking, on the other hand, is a broader category of methods to leave marks on an object, which also includes color change due to chemical/molecular alteration, charring, foaming, melting, ablation, and more. The technique does not involve the use of inks, nor does it involve tool bits which contact the engraving surface and wear out, giving it an advantage over alternative engraving or marking technologies where inks or bit heads have to be replaced regularly.


These versatile part marking methods can be used on almost any material, making them an ideal solution  for a variety of industries that require permanent marks for part identification and traceability. There is also a range of industrial applications where manufacturers can use laser etching and engraving to mark logos, date or time stamps, serial numbers, barcodes, 2D Data Matrix codes, and other important manufacturing information. 

WHAT IS THE DIFFERENCE BETWEEN LASER ETCHING AND LASER ENGRAVING?

 

The terms laser etching and laser engraving are often used interchangeably, but there are some important distinctions between them.

The key difference between these techniques is the depth of the mark. As the depth of the laser etched mark increases, it is often considered 
engraving followed by deep engraving

The method you select is dependent on the type of mark you want to achieve. For instance, some post-processing applications such as galvanizing require greater mark depth to ensure mark quality and readability. Certain industries also require particular marking depths to meet regulatory standards
.

HOW DO LASER ETCHING AND ENGRAVING WORK?

To create permanent marks, laser etching and engraving processes start with a beam of concentrated light energy.

The laser beam targets a small area of the material, known as the focal point.

The heat generated by the light energy allows the laser machine to alter the material's surface, while the focal point ensures it affects only a specified part of the surface.

The result is a smooth, high-contrast, lasting mark, which can be human readable (serial number) or machine readable (barcode), etched or engraved into the part's surface. 


MagEnergy also uses laser marking, check the link for detail:

https://youtu.be/5PhII8ZmAZ4



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