355nm uv laser marking USB Charger Cord The outer layer of some current charging data cables is generally made of PVC series plastic material. If ordinary inkjet marking is used, the marked information and pattern are not strong and easy to be worn off; if laser is used, the laser power and other parameters should be strictly controlled, because PVC material has a low melting point, too much laser energy can easily burn the material. At present, ultraviolet laser is the main equipment in the data line marking processing market. The nanosecond ultraviolet laser supplied by RFH Company is one of the first-class marking equipment.