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Picking the right 3D printing material can make or break a project. The same design can come out flexible or brittle, cheap or expensive, smooth or grainy, all depending on which material and process you choose. This guide breaks down seven of the most common 3D printing materials: PLA, PETG, MJF PA12, MJF PA12 S, SLS PA12, SLS PA2200, and SLA Resin so that you can match the right one to your part.
PLA (Polylactic Acid)
PLA is the most beginner-friendly 3D printing filament and a staple of desktop FDM printing. It’s derived from renewable resources like corn starch, prints at low temperatures, and warps very little, which makes it ideal for detailed, aesthetic prints and prototypes that won’t see much mechanical stress or heat.
Strengths: Easy to print, minimal warping, great detail, low cost Limitations: Low heat resistance (softens above ~60°C), brittle under stress, not suited for functional or outdoor parts
PETG (Polyethylene Terephthalate Glycol)
PETG is a step up from PLA in terms of durability. It’s more impact-resistant, more flexible, and holds up better to heat and moisture, making it a solid choice for functional parts, enclosures, and anything that needs to survive real-world handling. For extra stiffness, Carbon Fiber PETG is also worth considering.
Strengths: Tougher than PLA, better heat and chemical resistance, still easy to print
Limitations: More stringing during printing, less dimensionally precise than engineering-grade materials
MJF PA12 (Multi Jet Fusion Nylon 12)
MJF PA12 is an industrial-grade nylon printed using HP’s Multi Jet Fusion process, which fuses powder with an inkjet-applied agent and heat rather than a laser. It’s one of the most popular materials for functional, production-ready parts because of its strength, chemical resistance, and ability to handle complex geometries without support structures. Learn more about JawsTec’s MJF 3D printing service and the broader nylon 3D printing service.
Strengths: High strength, excellent chemical resistance, good for complex parts, reusable excess powder
Limitations: Default grey/black color, slightly rougher texture than resin-based processes
MJF PA12 S (Smooth)
PA12 S is a variant of MJF PA12 engineered for a smoother surface finish and better cosmetic appeal. It reduces pitting and surface texture issues common with standard PA12, making it a better fit for parts where appearance matters as much as function. See a full breakdown in JawsTec’s PA12 vs PA12S comparison.
Strengths: Smoother finish, good for both visual and functional parts
Limitations: Slightly less mechanically robust than standard PA12 in some applications
SLS PA12 (Selective Laser Sintering Nylon 12)
SLS PA12 uses a laser to sinter nylon powder layer by layer instead of MJF’s inkjet-and-heat approach. It’s slightly lighter and slightly less strong than SLS PA2200, but it’s a more cost-effective option, off-white in color, and can be dyed after printing. Explore JawsTec’s SLS 3D printing service for details.
Strengths: Lower cost than PA2200, good dimensional accuracy, dyeable
Limitations: Slightly weaker than PA2200, more porous surface than MJF parts
SLS PA2200
PA2200 is one of the most widely used SLS nylon materials in industrial additive manufacturing. Based on polyamide 12 and developed by EOS, it prints white, can be dyed, polished, or vapor smoothed, and offers strong mechanical properties, chemical resistance, and even biocompatibility, making it suitable for everything from functional prototypes to medical applications. Read JawsTec’s full PA 2200 material guide and the technical SLS PA2200 material page for design guidelines.
Strengths: Excellent strength and stiffness, biocompatible, well-established process, good surface detail
Limitations: Costs more than standard PA12, slightly heavier
For a side-by-side look at how MJF and SLS nylon parts compare mechanically, check out JawsTec’s MJF vs SLS breakdown.
SLA Resin (Stereolithography)
SLA uses a laser to cure liquid photopolymer resin into solid layers, producing the smoothest surface finish and highest resolution of any process on this list. It’s the go-to choice when fine detail, tight tolerances, and a polished look matter more than raw mechanical toughness. Two standout options in JawsTec’s SLA lineup are Proto Plus and WaterTight Proto.
Proto Plus is an accurate, durable general-purpose resin, well suited for prototypes and concept models where dimensional accuracy and a clean finish are priorities.
WaterTight Proto offers excellent waterproof performance along with strong resistance and durability. It comes in a default whitish-yellow color but can be modified, and it’s a good fit for batch runs and end-use parts, from medical models to household components.
Explore both materials in more depth on the SLA 3D printing service and resin 3D printing service pages.
Strengths: Highest resolution and detail, smooth out-of-the-box finish, WaterTight Proto adds waterproof durability
Limitations: Default colors may need modification, no dyeing available, generally less impact-resistant than nylon parts
Choosing the Right Material
| Material | Process | Best For |
|---|---|---|
| PLA | FDM | Prototypes, display models, low-stress parts |
| PETG | FDM | Functional parts needing durability and moisture resistance |
| MJF PA12 | MJF | Strong, complex, production-ready functional parts |
| MJF PA12 S | MJF | Functional parts with a smoother cosmetic finish |
| SLS PA12 | SLS | Cost-effective, dyeable functional parts |
| SLS PA2200 | SLS | High-strength, biocompatible, production-grade parts |
| SLA Resin (Proto Plus / WaterTight Proto) | SLA | High-detail prototypes; waterproof, durable end-use parts |
Still not sure which material fits your project? JawsTec’s team can help you choose between FDM, MJF, SLS, and SLA based on your part’s function, finish, and budget, browse the full 3D printing materials page or explore all 3D printing services to get an instant quote.