The appearance of laser engraving machine has broken the original pattern that mirror surface is not easy to process. The laser engraving machine peels off the coating on the back of the mirror through three-axis dynamic technology, and combines with 3d laser computer drawing software to customize the pattern and etch the LOGO, making it your own artwork. If you want to remove the coating on the back of the mirror, you can also have (dilute nitric acid solution) to dissolve it to generate silver nitrate, which is soluble; You can grind it. Just grind it off.