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Engraving

Laser engraving is the practice of using lasers to engrave or mark an object (it is also sometimes incorrectly described as etching, which involves the use of acid or a similar chemical). The technique can be very complex, and often a computer system is used to drive the movements of the laser head / galvo heads scanner. Despite this complexity, very precise and clean engravings can be achieved at a high rate. The technique does not involve tool bits which contact the engraving surface and wear out. This is a great advantage over alternative engraving technologies where bit heads have to be replaced regularly. The impact of laser engraving has been more pronounced for specially-designed new "laserable" materials. These include polymer and novel metal alloys.

In situations where physical alteration of a surface by engraving is undesirable, an alternative such as "marking" is available. This is a generic term that covers a broad spectrum of surfacing techniques including printing, hot-branding and laser bonding. In many instances, laser engraving machines are also able to perform marking, as an alternative way of processing the same material at upper layers level.

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