A lot of customers asked if CO2 laser can cut or engrave on Aluminium. The short answer is no unless the surface has been treated. The video demonstrates a CO2 laser engraves on ACM panel. ACM panel is laminated aluminium panel with coating on the surface. The CO2 laser can burn through the coating layers to show the contrast image. However, CO2 laser can not engrave on bare aluminium surface due to 1)not enough energy, 2) wrong light spectrum to be able to make the contrast on the material. That is why Fiber laser is used for aluminium engraving and cutting.

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