Durability of PCTG enhanced by the advantages of glass fibre

The potential of high-impact PCTG inspired us to develop another composite based on this copolyester – Spectrum PCTG GF10. The use of glass fibre filling has resulted in a high-strength filament with an intriguingly matt surface.

When creating the composition, we paid particular attention to reducing the abrasiveness of the glass fibres, which is typical for this type of filling. For this reason, we used functionalised glass fibres with a less aggressive geometry, reducing degradation of the printer nozzle.

Spectrum PCTG GF10 is a technical filament with high stiffness and hardness. Thanks to its extremely high interlayer adhesion and low shrinkage, it allows even intermediate users to execute large prints.

In addition, the glass fibres give the prints a distinctive texture, which, in addition to its undoubted aesthetic qualities, also translates into increased usability. Models made from Spectrum PCTG GF10 can be used wherever increased adhesion, increased durability against cyclic load and chemical resistance are important.

Technical data

Available diameter:
1.75 [mm]
Diameter tolerance:
+/- 0.03 [mm]
1.31 g/cm3
Thermal resistance:
HDT B - 78°C, VICAT - 89°C
Surface finish:
Verify your spool:
YES (course of diameter online graph - on the entire length of the spool, mean diameter, ovality, standard deviation individually for each manufactured spool)

How to use

Nozzle temperature:
Bed temperature:
Recommended printing speed:
30-80 mm/s
Recommended shell thickness:
0.40 - 2.70mm
Recommended layer height:
≥ 0.15mm
Closed chamber for printing:
not necessary
Dry box recommended:
Ruby or hardened nozzle recommended:
not necessary (for increased adhesion or to prevent warping: Dimafix, 3DLac, Magigoo)

Material characteristics

  • 10% glass fibers
  • HDT thermal resistance (0.45MN/m2) – 78°C
  • Vicat softening point – 77°C
  • high stiffness and tensile strength
  • good impact resistance
  • high surface quality after printing
  • good corrosion resistance
  • chemical resistance
  • good chemical resistance and electrical and thermal insulation,
  • high dimensional accuracy of the printed elements


  • visual and functional prototyping
  • manufacture of safety devices, housings and covers
  • electrical safety components
  • conceptual models
  • manufacture of parts exposed to chemical agents
  • manufacturing tools and equipment
Not sure what filament to choose?

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Where to buy

Check the list of our local and online distributors.

Verify Your Spool

Check the course of diameter on the entire length of the spool, ovality, mean diameter and standard deviation for each manufactured spool individually.

Where to buy

Check the list of our local and online distributors.

A wide range of products

Wide portfolio consisting of over 50 filaments with a versatile range of properties and applications, divided into three segments: desktop easy-to-use, industrial grade and high performance.

High quality

Innovation, extrusion know-how and highest quality filaments are the pillars of Spectrum philosophy. Our team is working continously on the development of new materials and their applications.

European made

All filaments from our portfolio are in-house made. We use modern production lines equipped with non-standard solutions to obtain highest quality final product.

Professional technical support

Our qualified support team helps at every stage from material selection to the 3D printing process.

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