Plastic Engraving How does Plastic Laser Engraving Machine Works? The high-energy light beam used in the device is absorbed into the material and its energy is converted into heating, which allows marking logos on the surface of the plastic.With laser marking, you can laser mark plastics such as ABS, PC, or polyamide permanently. Laser process on a variety of plastics such as PMMA – acrylic, polycarbonate, ABS, polypropylene, Delrin, polyamide, POM, polyester, or polyethylene.