Delrin^® is a polyoxymethylene (POM) based thermoplastic developed by DuPont^™. It is also known by other names such as acetal, polyacetal and acetal homopolymer. Laser cutting Delrin^® with a 10.6 micron wavelength CO₂ laser produces clean cuts with smooth edges. Laser engraving Delrin^® with a 10.6 micron wavelength CO₂ laser can produce a high degree of detail and relief. A 1.06 micron wavelength Fiber laser can be used to laser mark Delrin^® in certain cases. The carbon based pigment in black Delrin^® is heated by the laser beam, causing the surrounding polymer to foam. The foam scatters light creating an off-white, indelible mark in the Delrin^® surface.