While this strategy enabled local control over solubility, the UV-exposed regions were still slightly soluble directly after printing, negatively affecting print resolution and surface finish. We attributed this partial solubility to vitrification preventing the full conversion of epoxides , and post-printing thermal treatments were therefore explored for further curing of epoxides (Fig. ). Dynamic mechanical analysis (DMA) revealed that UV-exposed samples continued curing from 80°C to 150°C, with minimal additional curing at higher temperatures (Fig. ). Dissolution studies revealed that solvent resistance in UV-exposed regions scaled with the maximum temperature reached during heat treatment (see supplementary text, fig. , and fig. for details on dissolution studies). Increasing the treatment temperature above 150-160°C, however, resulted in incomplete removal of visible-exposed regions upon solvent exposure. A ramped heat treatment up to a temperature of 150°C was thus selected (Fig. and). The elastic moduli of the visibleand UV-cured parts increased to 2.5 GPa and 2.6 GPa, respectively, after thermal treatment (Fig.