PLA Drying Temperature Guide
Quick Answer: Dry PLA at 50-55°C for 4-6 hours. Do not exceed 60°C to avoid deformation.
Optimal Drying Settings
| Method | Temperature | Duration | Best For |
|---|---|---|---|
| Filament Dryer | 50-55°C | 4-6 hours | Best method, precise temperature control |
| Food Dehydrator | 50°C | 4-6 hours | Good alternative, affordable |
| Oven | 50°C | 4-6 hours | Not recommended, temperature inconsistent |
| Dry Box (Active) | 45-50°C | Continuous | Best for long-term storage |
Signs Your PLA Needs Drying
- Stringing: Excessive strings between parts of print
- Popping/crackling sounds: Steam escaping during printing
- Poor surface finish: Rough or bumpy texture
- Brittle filament: Snaps easily when bent
- Inconsistent extrusion: Variable line width
- Weak layer adhesion: Layers separate easily
Step-by-Step Drying Process
- Remove filament from printer - If currently loaded
- Place in dryer - Use filament dryer or food dehydrator
- Set temperature - 50-55°C (do not exceed 60°C)
- Dry for 4-6 hours - Longer for very wet filament
- Store immediately - Place in sealed container with desiccant while still warm
- Print promptly - Or keep in dry storage
Important Safety Notes
- Never exceed 60°C - PLA will begin to soften and deform
- Monitor oven drying - Ovens often have temperature inconsistencies
- Don't use microwave - Will damage filament
- Ventilate area - Even though PLA is safe, provide ventilation
How Long Does PLA Stay Dry?
After drying, PLA will begin absorbing moisture again:
- Open air: 1-4 weeks depending on humidity
- Sealed container with desiccant: Several months
- Vacuum sealed: 1+ years
- Dry box with active drying: Indefinitely
Drying Equipment Recommendations
Budget: Food Dehydrator
$30-50. Remove trays and place spool inside. Set to lowest setting (typically 45-50°C).
Standard: Filament Dryer
$40-80. Purpose-built with precise temperature control. Best option for regular use.
Premium: Dry Box System
$60-150. Active heating with humidity monitoring. Print directly from the box.
Prevention Is Better Than Cure
Store PLA properly to minimize drying needs:
- Seal in airtight containers or bags immediately after use
- Add silica gel desiccant packets (recharge when saturated)
- Store in cool, dry location away from sunlight
- Consider dry box with humidity control for frequently used spools
- Vacuum seal spools for long-term storage