Type III Color Anodizing
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Type III Color Anodizing

Precise modification of the naturally occurring titanium oxide layer to create thin film interference coloration of devices.

Technology

The titanium type III anodizing process is an electrochemical process conducted in an aqueous electrolyte, such as phosphoric acid.   During the process the implant performs as the anode, and at its surface water molecules undergo hydrolysis into hydrogen and oxygen.  The oxygen is driven by the electrical potential to the titanium surface where it forms additional titanium oxide on the scale of angstroms. 

The titanium oxide film is clear, allowing light to reflect off its surface, while some light passes through to the substrate reflecting and refracting out of phase. The difference in these light waves is perceived as color, hence no dyes or additives are required. 

With pre-treatment and precise control techniques, color shades including brown, purple, blue, gold, pink, and green are possible with this process.   

Titanium anodizing is primarily used in the medical device industry for aesthetics and ease of identification of devices.

Sample devices with a strong history of Anodize III utilization:

  • Bone screws
  • Plates
  • Dental Implants and Abutments

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