This is a laser tattoo removal machine test before shipment, the wood surface with black marks, just like the skin tattoo black colour, the black carbon can absorb the strong power from the 1024nm laser, when the strong laser power concentrate on the carbon, it will be explode and bounce from the skin surface.
From the video, we can see that the black carbon removal fron the wood surface, this effection is obvious as the carbon not permeate into the deep layer.
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