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76 SMT007 MAGAZINE I APRIL 2018 Chemical Resistance Test The chemical resistance test is performed by subjecting the material to various chemicals. The test specimens are submerged in a chem- ical solution for a given period and then are subjected to a drying cycle for a given period. This test is important in the material character- ization process due to it being an indicator of how the materials will react in various chemi- cal exposure applications. ESD Check Electrostatic discharge check is a very crucial test in the characterization process since this determines whether the 3D printed material can be used with or around live PCBs or any other components that carry a charge. The values obtained with the ESD check for each of the materials assist in the ranking of the mate- rials for application use. Flexural Test Flexural testing is performed by taking a test specimen and checking the materials ability to resist deformation under a specified load. This is a significant destructive test since the results of this test indicate how well a material can perform under mechanical stress but how well it can retain its dimensional accuracy. If the material does not break but bends or deforms under a load, the value or threshold at which this occurs helps guide which application the 3D printed material is well suited for. Thin Wall Flexural Testing Thin wall flexural testing is performed by taking a thinner specimen and subjecting it to load to check the material's ability to resist deformation. This test is different from the standard flexural test in the sense that it helps identify how the 3D printed materials react Figure 4: Density test results. Figure 6: ESD check results. Figure 5: Chemical resistance test results.