Wet filament is the #1 cause of "bad filament" complaints. This chart gives you the exact drying parameters per material — from VOXFIL's production data.
Drying chart
| Material | Hygroscopic? | Dry before use | Settings |
|---|---|---|---|
| PLA | Low | Not required — store in dry, sealed bag | Sealed bag, below 40% RH |
| PLA+ | Medium — recommended | Recommended if stored >2 weeks | Sealed bag, below 40% RH |
| PETG | Medium — recommended | Recommended — dry 4 h @ 65 °C before long prints | Dry box recommended, below 40% RH |
| ABS | Medium — recommended | Recommended — dry 4 h @ 80 °C | Sealed bag, below 40% RH |
| ASA | Medium — recommended | Recommended — dry 4 h @ 85 °C | Sealed bag, below 40% RH |
| PA | High — mandatory | Mandatory — dry 8 h @ 80 °C before printing | Dry box mandatory, below 20% RH |
| PA-CF | High — mandatory | Mandatory — dry 8 h @ 80 °C | Dry box mandatory, below 20% RH |
| PC | High — mandatory | Mandatory — dry 6 h @ 100 °C | Dry box mandatory, below 20% RH |
| TPU | Medium — recommended | Recommended — dry 4 h @ 70 °C | Dry box recommended, below 40% RH |
Signs your filament is wet
- Bubbling or hissing at the nozzle
- Stringing that retraction tuning can't fix
- Rough, matte, blistered surfaces
- Brittle parts that snap
- Poor layer adhesion
Drying methods
Filament dryers with temperature control are best; food dehydrators and ovens work if you verify temperature with a thermometer (most ovens overshoot badly). Print from a dry box for long jobs.
Every VOXFIL spool ships vacuum-sealed with desiccant — see how we control moisture.