How to fix brittle in resin print 3D models?

To fix brittleness in resin 3D prints, target common causes—under-curing, rigid resin, or weak layer adhesion—with straightforward adjustments. Extend UV post-curing by 5–10 minutes (a top fix for under-cured, brittle parts). For rigid resin, mix in flexible additives or switch to a more ductile option. Calibrate print settings like exposure time or layer height to strengthen layer bonding. If you’re new, start with a small test print and first extend post-curing—it often solves the most common issue quickly.