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Marking & Coding

Laser marking and coding are closely related applications. Marking involves physically creating a contrasting surface mark on the target material by discoloration or surface melting. Coding is a type of marking, however instead of marking with a static graphic or text, the mark varies, either from item to item as in a serial number, or from batch to batch as in an expiration date. 

    Surface discoloration produces a contrasting mark by creating a heat-induced color change in the target material; there is no melting or removal of material. This is the most efficient marking process since speeds are very fast and power requirements are low, typically below 25 W.

    Surface melting produces a contrasting mark by physically melting the material surface. The melting creates a color change in the material that contrasts with the unaffected (unmarked) areas. Typically, the melted material changes density and volume, creating a raised surface.

    Marking and coding with a high performance CO2 laser system offers several key advantages over traditional methods:

    • Crisp, clear imagery and text
    • Wide range of type fonts and sizes
    • Permanent marks that will not smear or rub off
    • High speed capability, suitable for high volume processing and production lines
    • Wide range of materials, including challenging materials like polyurethane foam and glass
    • Lower operating costs - no consumables, and very little required maintenance

    For detailed coding applications examples click here.

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