| Aspect | SLA (Stereolithography) | SLS (Selective Laser Sintering) |
|---|---|---|
| Process | Uses a UV laser to cure liquid photopolymer resin layer by layer | Utilizes a high-powered laser to sinter powdered materials layer by layer |
| Material Variety | Limited to photopolymer resins suitable for SLA | Supports a wide range of materials including thermoplastics, metals, and composites |
| Accuracy and Detail | Offers high precision and fine surface detail | Provides good accuracy with slightly rougher surface finish |
| Mechanical Properties | Typically more brittle but improving with advanced materials | Offers robust mechanical properties suitable for functional prototypes |
| Post-Processing | Requires support structures and post-curing for optimal results | Parts may require bead blasting or other finishing processes to improve surface finish |
| Complexity | Well-suited for intricate geometries and thin-walled structures | Can produce complex geometries and assemblies in a single print |
| Production Speed | Generally slower than SLS due to curing and post-processing | Faster build times compared to SLA, with minimal post-processing needed |
| Cost Efficiency | Lower material costs for resins, but higher equipment and maintenance costs | Cost-effective for small to medium-sized production runs, reducing tooling costs |
| Applications | Prototyping, concept models, and dental applications | Functional prototypes, end-use parts, and production tooling in various industries |
| Environmental Impact | Generally lower energy consumption compared to SLS | Energy-efficient process with minimal material waste due to powder reusability |
Conclusion: SLA offers high precision and surface detail suitable for intricate prototypes, while SLS provides robust mechanical properties and material versatility for functional prototypes and production parts.