Every 12 hours, 10 specimens are extracted from the water bath, dried with two 1.5 second bursts of compressed air, weighed and stored for subsequent mechanical testing. Figure shows the initial setup of the specimens. The experiment runs for 7 days until all of the samples are extracted from the water or the degradation is so noticeable that it is no longer possible to keep conducting the experiment due to the specimens breaking on touch. A first effect that can be easily observed in Figure is the progressive loss of transparency until samples are completely opaque after around 72 h, due to the polymer crystallization. During early prototyping, we noticed that some samples acquire a curvature (see Figure for an example) which creates difficulties when trying to insert them into the balance fixture. In order to prevent this, our improved design uses three layers of trays and smaller tolerance in the holes to help maintain the shape during the experiment. The temperature profile of the water during the experiment is shown in Figure . Temperature stays close to the 60.7 • C mean with a 0.6 • C standard deviation. Most of the biggest deviations match with the times where the lid is removed to measure the weight of the specimens, causing the temperature to drop slightly and requiring the bath to heat in order to recover the target temperature. Another possible cause for temperature variation could be the process of refilling water when the level drops below the sensor. The samples' weights, measured every 12 hours for 7 days, are shown in Figure . An increase in weight of around 1% can be observed in the first hours of the experiment, after which the weight becomes very stable. This value of water absorption for PLA close to 1% agrees with that which is previously reported in literature . On the other hand, no decrease in weight associated to degradation is perceived, as the PLA chains broken by hydrolysis typically remain in the material and do not affect the overall weight change of the specimen.