3D Printing Resin: Complete Guide
Resin 3D printing (SLA/MSLA) uses UV light to cure liquid photopolymer layer by layer. It produces the smoothest surfaces and finest details of any desktop 3D printing technology — but requires careful handling and ventilation.
Safety First
- Always wear nitrile gloves when handling uncured resin. It causes skin sensitization.
- Work in a ventilated area. Open window + fan at minimum. A dedicated space is ideal.
- Never pour resin down the drain. Cure it with UV light first, then dispose as solid waste.
- Keep away from children and pets. Uncured resin is toxic.
Resin Types
Standard Resin
The default resin type for most hobbyists. Delivers exceptional surface detail and smooth finishes at low cost. Ideal for miniatures, figurines, and display pieces. Brittle when cured — not suitable for parts under mechanical stress.
~$25/L
ABS-Like Resin
A toughened resin that mimics ABS properties — more impact-resistant and less brittle than standard resin, while retaining good surface detail. The best option when you need resin-quality finish on parts that will see some mechanical use.
~$45/L
Water-Washable Resin
Same print quality as standard resin, but cleaned with water instead of isopropyl alcohol (IPA). Makes the post-processing workflow simpler and cheaper. Important: the wash water contains dissolved resin and must be UV-cured before disposal.
~$40/L
Flexible Resin
A rubber-like resin for parts that need to bend and flex. Similar application space to TPU filament but with resin-level surface detail. More difficult to print successfully — support removal requires care to avoid tearing.
~$57/L