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LW-ASA UltraFoam Spectrum

Ref.: SPEC-LW-ASA-UF-NAT-175-750G

32.44 €

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Quantity	Discount	Price
10	10% 10%	29.20 € 29.20 €
20	15% 15%	27.57 € 27.57 €

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In stock 5 units available for immediate shipping.
units available for shipping in 6 - 14 days Available for shipment within 6 - 14 days

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Approximate delivery date: Friday 31 October

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The LW-ASA UltraFoam filament from Spectrum combines the toughness of technical ASA with an active foaming technology that produces printed parts significantly lighter without sacrificing stiffness or finish. This combination transforms professional 3D printing by providing a material ideal for outdoor applications, functional prototypes, and components where weight-to-strength ratio is critical.

Thermal control to adjust density and performance

The foaming behavior activates within a printing temperature range, allowing expansion adjustment by regulating nozzle temperature and material flow; below the activation threshold the material behaves like standard ASA, making it easy to optimize density, speed, and finish for the desired technical application.

Weight reduction and material savings

In the expanded state, LW-ASA UltraFoam allows multiplying usable volume per spool and substantially reduces printed part density, resulting in material savings and higher output per reel.

Matte finish that conceals layer lines and enhances aesthetics

The foamed structure of LW-ASA UltraFoam produces a matte, textured finish that softens layer lines, offering a professional look for technical and aesthetic parts. This makes it a top choice for housings, models, and visible components requiring a balance of appearance and functionality.

UV resistance and dimensional stability for outdoor use

LW-ASA UltraFoam retains ASA’s intrinsic properties, including high UV resistance, dimensional stability, and mechanical durability; these features ensure reliable performance in outdoor applications such as drone frames, RC model parts, and technical components exposed to weather.

Faster printing and flow optimization

Controlled expansion enables more efficient printing strategies: reducing flow rates and using thicker layers or single-pass solid perimeters allows shorter print times without losing functionality. This makes the filament a cost-effective option for short runs, rapid prototyping, and lightweight production.

Recommended applications: every gram counts

LW-ASA UltraFoam is especially suited for projects demanding lightness and strength: drone frames, RC model parts, technical housings, and lightweight industrial components. The combination of low density, professional finish, and weather resistance provides optimal performance and cost efficiency in engineering and additive manufacturing.

Why choose LW-ASA UltraFoam filament

LW-ASA UltraFoam offers weight reduction, higher output per spool, temperature-controlled density and flow, a matte finish that improves aesthetics, and UV resistance for outdoor use; features supporting professional 3D printing and technical projects prioritizing efficiency and durability.

Video 1: Introduction to the Spectrum filament range. Source: Spectrum

General information
Material	ASA
Format	750 g
Density	1.08 \| [Foamed] 0.36 g/cm³
Filament diameter	1.75 mm
Filament length	288.7 \| [Foamed] 866.1

Printing properties
Printing temperature	220-285 ºC
Print bed temperature	60-90
Chamber temperature	recommended for larger prints
Cooling fan	0-20 %
Recommended printing speed	15-150 mm/s mm/s

Mechanical properties
Izod impact strength	40.5 KJ/m²
Elongation at break	32 % %
Tensile strength	39 MPa
Tensile modulus	1600 MPa
Tensile modulus	1750 MPa

Thermal properties
Melting temperature	200 ºC
Softening temperature	90 ºC

Other
HS Code	3916.9
Spool diameter (outer)	200 mm
Spool diameter (inner hole)	52 mm
Spool width	55 mm

The foaming behavior of LW-ASA UltraFoam filament may vary depending on printer model and environmental conditions. Here are practical recommendations to optimize quality, lightness, and finish of parts printed with this high-expansion technical material.

Foaming Level Control

The foaming level depends on the printer type and printing environment. In enclosed printers, expansion can increase, reaching lower flows (e.g., 0.33 on Bambu Lab P1S/X1C vs 0.42 on a Prusa i3 MK3S). To achieve ultra-light parts and maximum expansion, keep a closed chamber and control working temperature between 230°C and 285°C.

Filament Drying Before Printing

Moisture negatively affects foaming, reducing expansion uniformity and creating surface defects. It is recommended to dry filament before each use for consistent results and minimal unwanted bubbles during extrusion.

Retraction Adjustment and Defect Control

Increasing retraction helps reduce stringing and artifacts between moves. Minor residues or imperfections can be easily removed manually thanks to the filament's matte texture, significantly improving final surface quality, especially in high-foaming modes.

Bed Adhesion and Temperature

If the model sticks excessively to the bed, it is advised to lower bed temperature, clean the surface, or apply an adhesive. These actions prevent warping and make part removal easier without damaging the bottom finish.

Rigidity and Flow Control

If the resulting part is too fragile or brittle, the flow is likely too low. Slightly increasing flow restores consistency and strength without compromising overall weight. In maximum expansion prints, flow is typically 28–40%.

Reference Parameters

On Bambu Lab P1S printers, common settings are:

Expanded print: 250 °C, 0.30 flow, 15 mm/s
Maximum foaming: 280 °C, 0.33 flow, 15 mm/s
Standard ASA mode: 215–230 °C, 1.00–1.01 flow, 200 mm/s

Expansion Calibration Procedure

To achieve maximum lightness and determine optimal expansion, follow this calibration method:

Step 1. Test Cube Printing

Print a thin-walled cube with a single perimeter (vase mode) in the 230–285 °C range, with 5 °C intervals. Use max 15 mm/s speed, fan 0–10%, and reduced accelerations. Always dry filament before testing.

Step 2. Wall Thickness Measurement

Measure wall thickness for each test cube and select the temperature giving the thickest wall, representing maximum material expansion.

Step 3. Flow Calibration

With optimal temperature set, print calibration cubes gradually reducing flow until wall thickness matches nozzle diameter. Ideal flow usually ranges from 28–40%.

Step 4. Final Model Printing

Print the desired model with calibrated parameters. Fine-tune flow within a few percent if necessary to achieve ideal density and finish.

This methodology ensures a perfect balance of lightness, strength, and surface quality, maximizing LW-ASA UltraFoam filament potential.