Melting marking refers to the metal is heated to melting point changes. Due to the oxidation of metal or other impurities, the surface of the metal after the re-solidification of the color will change. For example, the color of the markings that some steel produces after melting melts. Wait until the surface is - when the film, just after melting will produce a very high contrast mark on the surface. Laser marking is also possible with this method. Since the surface profile of the metal before and after marking does not change anything, this form of marking method has great advantages in some applications.
For example, the surface of widely used medical bone supports, artificial spine connectors, pacemakers, etc. is required to be as smooth as possible, so it is best to use this method for marking. Melting marking method is also suitable for some plastic materials. Plastic material in the melt will form grooves in the surface or the remaining surface structure changes, it can be laser marking.
