Laser printing it is used to engrave writings, logos or images on a metal support. The engraving is indelible and guarantees its durability, this technique is used above all for metal objects such as key rings and pens.
In laser engraving the design is imprinted on metal, the laser beam is controlled by a computer that allows you to reproduce the design in detail. Laser engraving cannot be done in color, in fact the emerging color is defined by the type of material the object is made of. The image to be reproduced is shown by a laser on a selenium cylinder made photosensitive, called " drum "or" magnetic roller ", which charges with the light, acquires the negative image, stores the toner and then returns it to the paper.