Remarkable product enriched with carbon fibres

PCTG is a copolyester that is gaining increasing popularity among users of 3D printing technology. In terms of properties, it is often compared to well know PETG. However, it t is worth noting that PCTG has a significantly higher impact strength compared to its big brother. PCTG’s high elasticity combined with high layer cohesiveness, high viscosity and negligible shrinkage make it a perfect polymer for composite materials.

The first of the PCTG-based composites we developed was a carbon fibre version – PCTG CF10. The carbon fibres used give the filament an extremely high stiffness, while reducing the brittle fracture typical for other PETG-based carbon composites. PCTG CF10 filament allows the printing of parts with increased hardness and tensile strength compared to classic PCTG. The use of carbon fibres increases the thermal resistance of the filament, further reduces shrinkage and gives the characteristic “carbon” matt appearance to the printed models.

With Spectrum PCTG CF filament, 3D printing is becoming an even more viable alternative to conventional plastic processing, enabling the production of durable and long-lasting everyday objects, regardless of size.

Technical data

Available diameter:
1.75 [mm]
Diameter tolerance:
+/- 0.03 [mm]
1.28 [g/cm3]
Thermal resistance:
HDT B - 78°C, VICAT - 89°C
Surface finish:
matte, carbon appearance
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% carbon fiber
  • HDT thermal resistance (0.45MN/m2) – 78°C
  • Vicat softening point – 77°C
  • high stiffness and tensile strength
  • good impact resistance
  • chemical resistance
  • high dimensional accuracy of the printed elements
  • carbon, matt printed surface


  • visual and functional prototyping
  • goodness of fit tests
  • conceptual models
  • manufacture of housings and covers
  • manufacture of parts subject to abrasive wear
  • manufacturing tools and equipment
Not sure what filament to choose?

Check filament parameters using our comparison tool.

Verify Your Spool

Check out our tool to verify purchased filaments.

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.

Not sure what filament to choose?



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