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Almost every kind of plastic (polycarbonate, ABS, polyamide, polyester, nylon and more) can be marked with the highest quality, quickly and permanently, although different plastics react differently to the laser marking process.
In fact, due to technical reasons, but mainly due to chemical reasons, it is not possible to make a blanket statement regarding the laser marking on plastics.
In any event, using different wavelengths and different laser sources (depending on the type of plastic you wish to mark), the overwhelming majority of plastic materials available can be marked with excellent results.
The pictures show a range of some plastic details that have been processed using laser marking plastic systems designed and manufactured by LASIT.
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Free of charge and without any commitment we can provide you with a sample test of your subject marked onto any material you request.
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In the foaming process, the laser beam melts the plastic surface on a localized area and then creates small gas bubbles on the material after it cools down. The gas bubbles reflect light in a diffused way. Afterward, the gas that has accumulated inside increases the volume of the material, creating a sort of foamed plastic. The part that has been laser marked appears brighter than the area around it and appears to be upraised from the surface.
Laser carbonization always produces a darkening of the material that has been marked. Plastic bonds are broken and carbon is released during this process. The resulting discoloration ranges from gray to bluish gray to black. Carbonization is used on clear plastics and organic materials (paper, packaging, wood and leather), with a resulting chromatic effect that changes from clear to dark.
Plastics absorb the light from the laser. Color pigments (deriving from additives, colors, etc.) and carbon in plastics are destroyed and vaporize as a result of localized heating. At this point, you will see a color change and notice foaming. The carbon in the plastic oxidizes and produces CO2, which is released from the plastic forming a layer of foam. Depending on the composition of the material, the discoloration may be clearer or darker. The dark plastics turn white where they were marked while clear plastics turn gray or black.
