Proper filament storage is essential for achieving consistent print quality and extending the lifespan of your materials.
The biggest enemy of most 3D printing filaments is moisture. Many thermoplastics naturally absorb water from the air, which can negatively affect both the material and the quality of your prints.
Some materials are more moisture-sensitive than others. PLA, Nylon, PVA, TPU, and ABS can all benefit from proper storage, while highly hygroscopic materials such as Nylon and PVA require extra care.
Why Proper Storage Matters
Moisture absorbed by filament turns into steam when heated inside the printer's hotend.
This can lead to several printing issues, including:
- Poor layer adhesion
- Surface imperfections
- Stringing and oozing
- Bubbles or popping sounds during extrusion
- Inconsistent extrusion
- Reduced mechanical strength of printed parts
Proper storage helps maintain consistent print quality and reduces unnecessary printing failures.
Best Practices for Filament Storage
Store Filament in Airtight Containers
The best way to protect filament is to keep it in airtight containers or resealable vacuum bags.
Adding silica gel or other desiccant packs helps keep humidity levels low and significantly extends the usable life of the filament.
Keep Filament in a Dry Place
Store your filament in a cool, dry location away from direct sunlight and excessive humidity.
If you regularly use multiple spools, consider using a dedicated dry cabinet or filament storage box.
Avoid Long-Term Storage
Even under good storage conditions, filament quality may gradually decline over time.
For the best printing performance, we recommend using filament within 12 months of purchase whenever possible.
Secure the End of the Filament
Always secure the loose end of the filament using the spool holes or a filament clip.
This prevents tangles and helps protect vacuum bags from accidental punctures.
How to Tell if Filament Has Absorbed Moisture
Moist filament often shows several common symptoms during printing:
- Popping or crackling sounds from the nozzle
- Steam escaping during extrusion
- Rough or porous surface finish
- Increased stringing
- Poor layer bonding
- Inconsistent extrusion
- Brittle filament that breaks easily
If you notice one or more of these signs, drying the filament is recommended before printing.
How to Dry Filament
Fortunately, moisture-damaged filament can often be restored by drying it properly.
The safest method is to use a dedicated filament dryer. Alternatively, many materials can be dried in a convection oven at a carefully controlled temperature.
Always follow the recommended drying temperature for the specific material, as excessive heat may permanently deform the filament spool or damage the material.
Allow the oven or dryer to reach the target temperature before placing the spool inside to avoid overheating during the warm-up phase.
Final Tips
Proper filament storage is a simple step that can dramatically improve print quality and reduce failed prints.
By storing your filament in a dry environment, protecting it from moisture, and drying it when necessary, you'll achieve more consistent and reliable printing results every time.