PLA drying starts with the full product name, not a universal temperature. Ordinary PLA, PLA+, silk blends and other modified lines should not be treated as interchangeable instructions.
Decide whether drying is the next useful step
A newly opened spool is not automatically a failed or wet spool. Polymaker says its filament is dried before shipping; that brand-specific statement does not establish the condition of every package after storage and transport. Check the seal, the manufacturer’s preparation instructions and any actual printing symptom.
If the only problem is stringing, use the diagnosis workflow before changing several settings. If the exact manufacturer calls for drying before use, follow that instruction even when the spool looks normal.
A documented example, not a PLA-wide setting
Prusa lists 45°C for six hours for Prusament PLA and rPLA. Those are named-line instructions. Do not transfer them automatically to HATCHBOX PLA, eSUN PLA+, SUNLU PLA+2.0 or Bambu PLA Basic. Verify the spool’s own heat limit as well as the material setting.
Check the document date. For example, eSUN’s earlier PLA+ data sheet marks its drying recommendation as N/A. That historical omission is neither a current drying recipe nor proof that a spool never needs drying.
Leave with a PLA drying record you can use
The next step is a documented cycle for the exact line. If its instructions remain unclear, obtain them before choosing a preset; neither the PLA name nor a hotter setting resolves the gap.
Keep the record tied to this formulation.
Exact product line and spool identification.
Manufacturer instruction link and document revision.
Permitted temperature, duration and spool requirements.
Dryer model and selected cycle.
Printing symptom before and after, if there was one.
Follow the general drying steps once these are established, then return the spool to suitable storage.
