Short answer: PLA is easy, affordable, and detailed. ABS is tougher and much more heat resistant, and can be smoothed to a glossy finish.
Side by side
| PLA | ABS | |
|---|---|---|
| Cost | Lowest | Low material cost, but harder to print |
| Ease of printing | Very easy | Needs an enclosed printer and experience |
| Toughness | Stiff but brittle | Tough and impact resistant |
| Heat | Softens around 55–60 °C (130–140 °F) | Holds shape to about 95–100 °C (200–210 °F) |
| Finish | Great detail, paints well | Sands, paints, and can be vapour-smoothed to a gloss |
| Outdoors | Not for long-term use | Yellows in sun; ASA is better |
Choose PLA for
- Display pieces and models
- Low-cost prototypes
- Fine detail
Choose ABS for
- Car interior parts
- Enclosures and tool parts
- Parts needing a glossy, moulded look
Still unsure? Find a local shop and ask which material they'd recommend for your part.