Why is My PLA Brittle?
Common causes
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Moisture absorption: PLA absorbs moisture over months of open storage
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Stored in humid environment: garage, shed, bathroom-adjacent rooms
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Too cold storage: rare but sudden cold cycles can stress PLA
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Wrong print temperature: too cool = poor layer bonding = brittle prints
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Very old spool: years of cumulative humidity exposure
Browse
Filament storage and drying guide, All PLA at Siddament.
