Disadvantages include high thermal expansion, poor resistance to weathering, prone to stress cracking, difficult adhesion, flammability, poor temperature resistance and low strength/rigidity. These disadvantages must be taken into consideration when mass producing this material for 3D printing. The cheapest type of polyethylene is LDPE which stands for low density polyethylene. Another advantage of LDPE is that it is really flexible unlike HDPE or high density polyethylene. Some of the different processes used for polyethylene to become a 3D printed object include selective laser melting (SLM), selective laser sintering (SLS), and electron beam melting (EBM). First we will talk about SLS and the process that polyethylene is subjected to. To begin with, the definition of SLS taken from the use of polymeric materials in SLS has advantages that do not arise from other materials such as metallic or ceramic materials and this is due to the fact that polymeric materials have lower processing