Inscription done by using Laser beam can be categorised into 3 major categories. Although the three categories sound similar, they are different in their procedures and methods and are altogether based on the level of actions that are reflected on the engraving materials. The first method is the laser marking; here the laser beam used to carry out the marking, just fades away a part of the material surface leaving a comparatively lighter area than its surroundings so that the information is clearly visible. But however this method can be used on selective materials where the markings must be up on to the surface only.
The second method is the laser engraving. In this method the information that has to be displayed is deeply engraved, by removing a calculated outer surface of the engraving material to certain depth. This ensures that the engraving is quite permanent and solid. Then the third method is laser etching. In this method a certain amount of the engraving material is carefully removed by subjecting it to a certain amount of heat, in form of a fine pointed tip, so that the engraving material surface is removed precisely with a fine finish. So in a way engraving is marking or writing on the surface of the material, with various degrees of impact.
Being a method where in the the intensity of the laser beam used will be quite lower, a negligible amount of heat is generated thereby ruling out any rise in temperature of the surface. Even in this spite where it can be used on delicate surfaces that may otherwise get spoiled by the temperature, it is less commonly implemented. The other method that is the laser engraving is the involvement of quite a good amount of heat, which is used to almost evaporate the amount of engraving material surface. Since this method uses high levels of heat, it cannot be used on materials that are less resistant to higher temperatures. But however it is an ideal methodology for parts that are subject to wear and tear. Certain engraving material, tend to change their surface properties along with increase in temperature, this method can be employed in cases where the fear of temperature related is nil.
Industries like Signvec, who deal with Engraving materials and products, offer laser based technological machinery such as laser cutter, engravers like rotary engravers and engraving machines, and the CNC engraving machine, is the one which employs the computer based laser cutting and engraving.
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