Prusament introduces foaming PLA for lightweight models
The material targets RC aircraft, costume pieces and other weight-sensitive prints.
What happened
Prusa introduced Prusament PLA Lightweight, an actively foaming filament. Heat in the nozzle expands the material, allowing a given mass of filament to produce more printed volume.
The manufacturer reports weight reductions of up to 65% compared with regular PLA under suitable conditions. Suggested applications include RC aircraft, floating models and costume components.
Foaming also changes color, texture and extrusion behavior. The article describes temperature-dependent expansion and increased stringing, making material-specific profiles important. The headline weight reduction is a maximum claim, not a guarantee for every design.
Read the sources
Primary-source reporting; this is not a hands-on review. Sources checked Oct 25, 2026.