Laser marking on metal primarily uses two methods: direct laser engraving and laser marking sprays with CO2 lasers. Here's a breakdown of the two:

Fast and Pricey. Excellent Results Also Infrared Laser $500

Direct Laser Engraving (Fiber Laser) $1000 entry level.

• This method utilizes fiber lasers, the most common type for metal marking.
• The laser beam directly interacts with the metal surface, removing a thin layer to create the mark.
• Advantages:
  • Permanent marks with high precision and detail.
  • Clean process with minimal fumes.
  • No pre- or post-processing required.
• Disadvantages:
  • Fiber lasers are generally more expensive than CO2 lasers.
  • May not be suitable for all metals, especially reflective ones like aluminum.

Laser Marking Sprays with CO2 Laser

• This method is suitable for CO2 lasers, which are not as effective on bare metal surfaces.
• A special metal marking spray is applied to the metal beforehand.
• The laser beam interacts with the spray, causing a reaction that leaves a permanent mark on the metal.
• Advantages:
  • More affordable than fiber lasers.
  • CO2 lasers are generally cheaper than fiber lasers.
  • Works on a wider variety of metals, including reflective ones.
• Disadvantages:
  • Less precise and detailed marks compared to direct engraving.
  • Requires additional steps for applying and removing the spray.
  • Fumes may be produced during the marking process, requiring proper ventilation.

Laser Marking Paper

• Laser marking paper is a recent development and is different from the sprays mentioned above.
• It's a thin sheet applied to the metal surface.
• The laser interacts with the paper, transferring the color or marking onto the metal.
• Advantages:
  • Creates colored markings on metal.
  • May be easier to use than sprays for some applications.
• Disadvantages:
  • A relatively new technology with limited availability.
  • Potentially less durable than direct laser engraving or laser marking sprays.

In conclusion, the best method for marking metals with a laser depends on your specific needs. Consider factors like the type of metal, desired mark detail, budget, and processing time.