To further improve the layer stacking and scaffold height, a MEW printer with automatically adjustable voltage and Z-height of the print head would be needed, as demonstrated by Wunner and co-workers. While printing, we observed a colour change from yellow to brown of the drug loaded extrudates over time (Figure ). IND is known to be easily degradable above its Tm, therefore, a possible degradation was investigated by TGA measurements (Figure ). The TGA graph of the polymer showed an initial mass loss of 5% while heating to 140 °C, followed by a plateau during the isotherm. The initial mass loss could be caused by evaporation of water as the used polymer is hygroscopic and was not dried specifically before the measurement. Increasing the temperature to above 350 °C, degradation of the polymer takes place, as evidenced by the mass loss. A different behaviour was observed for the extrudates. During the initial heating process and the isothermal heating an increase in mass, albeit it minor, was observed. The mass gain might be due to oxidation or measuring artefact, as the polymer is expected to be stable up to 350 °C. Similar results have been observed for TGA measurements of MEWprocessed samples using PVDF. Further heating to 900 °C, resulted in a mass loss from 99 to 9 % due to the degradation of the polymer.