Why It’s Essential to Dry Your Filament
Most 3D printing filaments are hygroscopic, meaning they absorb moisture from the air—especially over time—compromising their properties and print quality. This often results in issues like stringing, inconsistent extrusion, brittleness, and even pop noises during printing.
Key Signs Your Filament Needs Drying
Look out for these red flags:
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Popping or sizzling sounds when extruding—caused by moisture vaporizing
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Excessive stringing or poor layer adhesion
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Inconsistent extrusion or swelling filament diameter
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Brittle filament that snaps easily
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Bubbling, blobbing, under-extrusion, or surface defects
Best Methods for Drying Filament
Here’s how to get your filament back into top shape:
1. Specialized Filament Dryers
Optimal performance and convenience—most support multiple spools and integrate temperature control and storage. My favourite is the Sunlu S4, which can fit 4 spools of filament.
2. Oven Drying
An accessible option if your oven maintains low heat:
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PLA: ~40–50 °C for 4–6 h
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ABS: ~70–80 °C for 4–6 h
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PETG: ~60–70 °C for 4–6 h
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Nylon: ~75–80 °C for 5–7 h
Use a convention oven if possible to maintain even heat, and monitor closely to avoid melting.
3. Food Dehydrators
Cooler heat, affordable and effective:
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PLA: 40–50 °C, 5–7 h
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ABS: 70–80 °C, 6–8 h
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PETG: 60–65 °C, 5–7 h
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Nylon: 70–80 °C, 8–12 h
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TPU: 45–55 °C, 6–8 h
4. DIY Drying Solutions
Use airtight containers or vacuum bags with desiccant packs or build your own dry box to protect filament from humidity.
5. Manufacturer-Specific Guidelines
High-end materials may require tailored conditions. For instance, Bambu Lab’s recommendations:
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PLA: 50 °C for 8 h (or 60–70 °C in printer with cover)
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PETG, ABS, ASA, TPU, PC: up to 85 °C, 8–12 h depending on material
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Engineering nylons (PA, PPS, etc.): 100–140 °C for 8–12 h, plus desiccant storage
Preventing Future Moisture Issues
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Store in airtight containers with desiccant (e.g., Mylar bags or sealed bins)
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Monitor humidity with indicator cards or hygrometers
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Avoid exposing filament to humid environments like garages or basements
Quick Drying Guide at a Glance
| Filament Type | Temperature | Dry Time | Best Method |
|---|---|---|---|
| PLA | 40–50 °C | 4–6 h | Oven, Dehydrator, Dryer |
| ABS | 70–80 °C | 4–6 h | Oven, Dryer |
| PETG | 60–70 °C | 4–6 h | Oven, Dehydrator, Dryer |
| Nylon | 75–80 °C or 100–140 °C (advanced) | 8–12 h | Oven, Specialized Dryer |
| TPU | 40–50 °C or 45–55 °C | 4–8 h | Oven, Dehydrator |
Looking for materials or tools to improve your 3D printing workflow? Filamigo offers premium filament storage, drying solutions, and accessories that can elevate your results:
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Keep your filament dry and ready with high-quality airtight storage bags and desiccant packs from Filamigo Australia.
Final Thoughts
Dry filament is crucial for achieving reliable, high-quality prints. By recognizing moisture symptoms and utilizing effective drying techniques—whether via a filament dryer, oven, or DIY solution—you can restore consistency and strength to your prints. And by storing properly, you’ll extend the life of your filament and avoid common yet avoidable issues.
