Fig. 5.

Strengthening the design around well-like features decreases the impacts of cupping and resin shrinkage. (i) Illustrated computer-aid designs, and (ii) photos of the top and bottom views of the corresponding print. All pieces were printed in FormLabs Clear resin. Well A had thin walls, thin base, and strain from 90° connections at the bases and the sides. Well B had thicker surrounding walls and a thicker, filleted base, but retained 90° outer corners. Wells C and D further reduced the strain by rounding out the external edges. All pieces were qualitatively evaluated, with the absence of cracks (arrowheads) and pinholes (shown by arrows) indicating a strong design.