All You Need To Know About Laser Etching
Laser etching is a technique that involves melting the surface of parts and products to form marks. It belongs within the laser marking category, which also encompasses laser engraving and laser annealing. It can be used with a wide range of metals, making it extremely versatile.
The exact year laser etching was invented is uncertain. We do know that laser engraving was first used in 1978. And both the processes are somewhat the same. However, laser engraving involves some level of melting.
Laser Marking Technologies decolourize the material’s surface, whereas laser etching and engraving remove a portion of the surface area while marking.
What is the difference between laser etching and laser engraving?
While laser etching is faster, laser engraving is more long-lasting. This is due to the fact that laser etching requires less energy than laser engraving to reach a material’s melting point. Deep laser engraving may require numerous laser passes and, as a result, take even more time.
The holes produced by engraving, on the other hand, are more resistant to abrasion than the elevated marks created by etching. Moreover, laser etching elevation can be up to 80 microns, while laser engraving depth can reach 500 microns. The depth to which the laser penetrates the surface is the main distinction between laser etching and engraving.
When it comes to making high-contrast markings, laser etching stands out. Laser engraving produces solely black marks, but laser etching can create both black and white marks. As a result, high-contrast engravings are frequently created by combining laser engraving with laser etching.
Unless you want a high level of abrasion resistance, laser etching is preferable than laser engraving. If you’re still undecided about which is best, then you can consult a laser expert.
What is the process of laser etching and laser engraving?
Laser etching and laser engraving processes begin with a concentrated beam of light energy to create permanent marks. The focal point is a small area of the material where the laser beam is focused.
The laser machine uses the heat generated by the light energy to alter the material’s surface, while the focal point guarantees that only a specific region of the surface is affected.
The result is a uniform, high-contrast, long-lasting mark etched or engraved into the part’s surface, which can be human readable (serial number) or machine readable (barcode).
This mark will be etched to a depth of around 0.0001 inches during the laser etching process. The marking depth in the laser engraving process is normally up to 0.005 inches.
This article explains laser etching and everything related to it.
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Sanju kmr
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