Hygroscopic Filaments Hygroscopic filaments absorb moisture from the air, affecting print quality and mechanical properties. Nylon, PETG, and PVA are highly hygroscopic, requiring airtight storage with desiccants. Moist filament can cause bubbling, under-extrusion, and weak layer adhesion. Drying affected filament in an oven or filament dryer restores its printability. |