Laser engraving is based on numerical control technology, and laser is the processing medium. The physical degeneration of the material to be processed by the instantaneous melting and vaporization under the irradiation of laser engraving can make the laser engraving achieve the purpose of processing. Laser engraving is the use of laser technology to engrave text on an object. The characters engraved by this technology have no nicks, the surface of the object is still smooth, and the writing object will not abrasion. (Aluminum alloy can be laser engraved in black font)