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Engraving creates depth into the surface of a material by removing the material substrate leaving a depression. This can be useful for marking materials that do not change color when absorbing CO2 laser light, since it creates a shadowing effect that provides contrast. Engraving is a common type of laser “mark”, creating deeper marks more resistant to wear for coding or serialization. Engraving is the least efficient laser mark due to the increased time required to remove material.

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