The Complete Resin 3D Print Post-Processing Guide
Print quality depends as much on post-processing as on exposure settings. This guide covers every step from wash to finish.
Step 1: Washing — Removing Uncured Resin
| Method | Solvent | Time | Pros |
|---|---|---|---|
| IPA | 95%+ | 3-5 min | Fast, reliable |
| TPM Cleaner | TPM-based | 5-8 min | Low odor, non-flammable |
| Water Wash | Water | 5-10 min | Non-toxic, cheap |
| Ultrasonic | IPA/Water | 2-3 min | Reaches cavities |
Best Practices
- Two-stage washing: Dirty bath first, clean bath final
- Agitate: Still solvent leaves residue in hollow areas
- Drain holes: Orient downward so solvent flows through
- Air dry: 2-3 minutes after washing
Step 2: Support Removal
- Pre-cure: Clip close, sand smooth — resin is flexible, gentler on details
- Post-cure: Snaps off cleanly but risks scars
- Warm water: 40-50°C soak for 30 seconds softens attachments
Step 3: Curing
| Resin Type | Curing Time | Note |
|---|---|---|
| Standard / Standard Lite | 5-8 min | Rotate halfway |
| ABS-Like / Tough | 8-12 min | Longer for impact strength |
| Flexible / Elastic | 5-6 min | Over-cure reduces flexibility |
| Dental / Castable | 8-10 min | Follow manufacturer guide |
Curing Tips
- Rotate/flip prints halfway for even exposure
- Over-curing makes resin brittle
- Submerged curing in water prevents tacky surface
Step 4: Surface Finishing
- Wet sanding: 400→800→1500+ grit
- Primer: Automotive primer fills layer lines
- Clear coat: UV-resistant prevents yellowing
- Polishing: Plastic polish after 3000-grit for transparency
Quick Troubleshooting
| Issue | Cause | Fix |
|---|---|---|
| Sticky surface | Insufficient wash/cure | Rewash, cure 2-3 min more |
| White residue | Dried solvent | Wipe with microfiber |
| Brittle parts | Over-cured | Reduce time 30-50% |
Use ANTINSKY Standard Lite Resin for balanced detail, strength, and affordability, or ABS-Like Resin for engineering parts.
— Inno Uncle