Types of 3D printing: FDM, resin and powder compared
The three families of 3D printing — filament, resin and powder — explained with strengths, limits and typical uses. Which technology to choose depending on what you need to print.
In short
- 3D printing isn't a single technology: the three main families are filament (FDM), resin (SLA/MSLA/DLP) and powder (SLS, metal).
- FDM is the most common and cheapest; resin gives the most detail; powder produces sturdy parts with no supports, but it's professional-tier.
- For almost every maker, the starting point is FDM.
How many types of 3D printing are there?
Every 3D printer builds an object layer on layer (additive manufacturing), but they differ in how they deposit or solidify the material. The three families that matter to a maker are filament, resin and powder.
1. Fused filament (FDM / FFF)
A plastic strand is melted and extruded layer on layer. It's the most common, cheapest and most versatile technology: great for functional parts, prototypes and large objects. Typical materials: PLA, PETG, ABS. It's the entry point to 3D printing — machines like the Bambu Lab A1 or Anycubic Kobra 3 are examples.
2. Resin (SLA / MSLA / DLP)
A light-sensitive liquid is solidified with UV light. Very high detail and smooth surfaces: it's the choice for miniatures, jewellery and dental models. In exchange it needs post-processing (wash + UV cure) and care with safety. The acronyms indicate the light source: laser (SLA), LCD screen (MSLA), projector (DLP).
3. Powder (SLS, MJF, metal)
A bed of powder is sintered with a laser or a thermal agent. The big advantage: parts need no supports, because the powder itself holds them up. It produces sturdy parts and complex geometries, but it's a professional-tier technology in cost and footprint. It also includes metal printing.
Which should you choose?
| Family | Strength | Limit | For whom |
|---|---|---|---|
| FDM | cost, simplicity, sturdiness | medium detail | most makers |
| Resin | extreme detail | brittleness, post-processing | miniatures, jewellery, dental |
| Powder | no supports, sturdy parts | high cost | professionals, small batches |
To start, FDM offers the best balance of result, cost and ease. Resin and powder come into play when the project asks for something FDM can't give.
