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SLS use a a high-powered laser beam such as a carbon dioxide laser to join together raw materials and create the desired product/model. The material can be plastic, metal, glass or ceramic in a powdered form. The whole process of SLS is additive in nature. The laser beam takes cross section geometrical coordinates detail from a CAD drawing and adds the powder surface accordingly. When the layer is finished, the surface is powdered again and the process is repeated until the model is complete.