Spectrum ASA LW UltraFoam Filament Dark Grey 0.75kg Refill

Spectrum ASA LW UltraFoam is a professional-grade, lightweight 3D printing filament in dark grey, engineered with advanced active foaming technology. By leveraging the inherent UV and weather resistance of ASA, this material allows for significant weight reduction in printed parts without sacrificing structural integrity. As the filament is heated, it expands, enabling users to achieve a density as low as 0.33 g/cm³ and reducing the weight of final models by up to three times compared to standard materials. This refill spool is designed for efficiency and sustainability, providing a high-performance solution for advanced users who require lightweight, durable components.

Advantages

The primary benefit of this filament is its ability to undergo controlled expansion during the printing process, which is activated at temperatures between 230°C and 285°C. This foaming effect not only reduces the overall weight of the object but also increases the material yield, as one spool can produce as much volume as three standard spools. The matte, rough surface finish effectively masks layer lines, resulting in a professional aesthetic. Furthermore, the material maintains the excellent mechanical properties of ASA, including high dimensional stability and resistance to harsh outdoor environments, making it a versatile choice for functional engineering projects.

Suitable for

• RC modeling and drone components
• Lightweight functional prototypes
• Outdoor technical parts requiring weather resistance
• Large-scale models where weight reduction is critical

This filament may not be suitable for applications requiring high-gloss surface finishes or extreme heat resistance beyond the standard ASA threshold. Additionally, it is not recommended for beginners, as the active foaming process requires precise calibration of temperature, flow rates, and retraction settings to achieve optimal results.

Key specifications

• Material density: 0.33 g/cm³ to 1.08 g/cm³
• Nozzle temperature range: 220°C–285°C
• Heated bed temperature: 60°C–90°C
• Printing speed: 15–150 mm/s
• Spool type: Eco-friendly cardboard core (Refill)
• Compatibility: Compatible with reusable spool systems

To achieve the best results, start by printing a single-perimeter test cube in vase mode to determine the optimal expansion rate. Conduct tests within the 230°C–285°C range at 5°C intervals, keeping fan speeds low (0–10%) and print speeds slow (15 mm/s). Once the ideal temperature is identified, calibrate the flow rate—typically between 28% and 40%—until the wall thickness matches your nozzle diameter. Always ensure the filament is dry before use to prevent moisture-related artifacts.

What to consider before purchase

• Requires an enclosed-chamber printer for best foaming results
• Filament must be dried prior to printing to ensure consistent expansion
• Requires manual calibration of flow and temperature for each specific model
• Designed for use with reusable spool systems

For optimal performance, always store the filament in a dry environment and use a filament dryer if the material has been exposed to humidity, as moisture significantly degrades the foaming quality and surface finish.