RFH 355nm solid UV laser marking fine sandpaper, not easy to burn
RFH 355nm solid UV laser marking fine sandpaper, not easy to burn
Those who have used fine sandpaper will definitely notice that there are some symbols and numbers on the surface of the sandpaper to indicate the mesh and brand of the sandpaper, which is called marking on the sandpaper. You must know that these marks are not printed, but are generally marked by laser.