Polymaker Light Weight PLA Filament 1.75mm Bright Red - Low Density

In this review of the Polymaker Light Weight PLA filament, the bottom line is simple: it is for makers and modelers who need lower-density, stiff prints without changing regular PLA settings. The filament's main appeal is its reduced density and matte finish, which yield lighter parts while using familiar print profiles. The review examines printability, layer adhesion, and real-world use for hobby aircraft, prototypes, and display pieces, noting both the advantages of low weight and the occasional variability reported by users.

Key Features

• Low density: The filament has a reduced density of 0.9g/cm3, producing lighter parts compared to standard PLA and helping reduce overall model weight.
• Regular PLA settings: It prints at the same nozzle and bed temperatures as typical PLA, so existing profiles can be used without extensive tuning.
• No foaming in print: Unlike some lightweight PLAs, this material does not foam during extrusion, which eliminates a common source of surface defects.
• High rigidity and adhesion: The filament is formulated for stiffness and strong layer bonding, making it suitable for rigid parts such as radio-controlled plane components.
• Matte finish and paintability: The filament delivers a matte surface that hides layer lines well and accepts paint for finished models or gifts.
• Packaging and handling: Spools are dried, vacuum-sealed with desiccant and wound to minimize tangles for reliable use.

Who It's For

This filament is aimed at hobbyists, model aircraft builders, and prototypers who want lighter prints without changing their slicer profiles; using the same nozzle and bed temperatures as regular PLA is particularly convenient. It is also a good choice for anyone seeking a matte finish that conceals layers and takes paint well for display pieces and gifts.

Those who need the absolute lightest possible foamed structures or who require highly flexible or elastomeric materials should look elsewhere; this filament emphasizes rigidity and dimensional accuracy rather than extreme lightness or flexibility.

Pros & Cons

Pros

• Lower density produces lighter parts while keeping familiar print settings.
• Strong layer adhesion and rigidity make it reliable for structural hobby parts.
• Matte finish and consistent color that is easy to paint and hides layers.
• Vacuum-sealed, dried packaging and tangle-free winding reduce moisture and handling issues.

Cons

• Some users report mixed results with brittleness or adhesion on certain prints, so initial tuning or part design adjustments may be needed.
• A few prints may be unusable on first attempts for some users, indicating variability in early print runs or setup sensitivity.

Specifications

Our Verdict

The Polymaker Light Weight PLA is a practical option for hobbyists and model builders who want lighter, stiff parts without learning new print settings; its matte finish and good bed adhesion make it especially suitable for painted display models and radio-controlled plane components. It represents solid value for those prioritizing reduced part weight and dimensional reliability, though a few users may need to dial in first-layer and cooling settings to avoid occasional brittle prints.

Frequently Asked Questions

Does it print like regular PLA?
Yes. Use nozzle 190C, bed 50C and typical PLA speeds; no special profile is required.

Is it suitable for RC plane parts?
Yes. The filament emphasizes high rigidity and layer adhesion, making it a good choice for stiff structural parts.

How should I store the spool?
Keep it in the resealable bag with desiccant when not in use to prevent moisture pickup.