In the experiments performed to validate the setup, we studied the behavior of PLA and several grades of PA when immersed. In the PA experiment, the most notable results were the important increase in water absorption at 60 • C compared to room temperature, and the greatly reduced absorption of PA12, both neat an recycled, compared to the other formulations tested. In the case of PLA, absorption was close to 1% and the experimental setup was used to collect specimens for impact testing. With the specimens submerged at 60 • C we observed a first phase of plasticization of the material that increases the resistance to impacts, which is later decreased by the degradation of the material until its resistance is negligible.