LoSpeed UV Laser Marking Machine 3W 5W 8W adopts three order intracavity frequency doubling (THG) technology. Compared to infrared laser, 355nm ultraviolet laser has extremely small laser facula, which reduces the mechanical deformation to a significant extent and diminishes the influence of heat-process to a very limited area. Therefore it can be mainly applied for hyperfine marking and engraving, especially suitable for marking on packing materials ,medicines, Mobile phones ,keyboard , chargers etc.