3DXTech Obsidian PA6+CF 1.75mm 1kg [Markforged ONYX Alternative]

3DXTech Obsidian PA6+CF 1.75mm 1kg [Markforged ONYX Alternative]

£126.53 £105.44 ex. VAT

In stock

£126.53 £105.44 ex. VAT

Obsidian™ PA6+CF filament was formulated to be a lower-cost drop-in Markforged Onyx Alternative suitable for all Markforged printers.

Availability: In stock SKU: 42953
Save 10% off the eBOX when you buy PC-ABS or Nylon





Obsidian™ PA6+CF filament was formulated to be a lower-cost drop-in Markforged Onyx Alternative suitable for all Markforged printers. We developed this material after extensive analysis and testing on our own in-house Markforged printer and many outside beta testers. The result is a seamless printing experience that produces parts with an outstanding appearance and excellent mechanical properties. Made using premium high-modulus carbon fiber and PA6 copolymer, Obsidian™ is an excellent alternative to Onyx™ that allows our customers to save money when using your Markforged printer.

Don’t have a Markforged printer? That’s no problem – Obsidian™ is also compatible with all non-Markforged printers that are suitable for printing PA6+CF.  Take advantage of the excellent strength, stiffness, and appearance of this specialty material without over spending on Markforged Onyx™.


Benefits of Obsidian™ PA6+CF [Markforged Onyx Alternative]:

  • Drop-in for Onyx™ without any changes required to print settings
  • Excellent strength and stiffness
  • Resistant to aliphatic hydrocarbons (oil/gas/lubricants)
  • Superior dimensional stability (low warp/shrink/CTE)
  • Compatible with Markforged FX20, X7, X5, X3, Mark Two, Onyx Pro, and Onyx One printers

Filament Specifications:

Diameter:  1.75mm +/- 0.05mm

Markforged Print Recommendations:

  • Obsidian™ was formulated to be a drop-in for Onyx™ without any changes to the print settings.

Recommended Print Settings for Non-Markforged Printers:

    • Extruder: 265-285°C
    • Bed Temp: 90-110°C
    • Nozzle: We currently recommend a hardened steel nozzle
    • Heated Chamber: Recommended
    • Drying Instructions: 90°C for 4 hours if the filament exhibits signs of moisture

Disclaimer (of course): This technical information is furnished without charge or obligation and accepted at the recipients sole risk. The information provided in this data corresponds to our knowledge on the subject at the date of its publication. This information may be subject to revision as new knowledge and experience becomes available. The data provided should not be used to establish specification limits or used alone as the basis of design; they are not intended to substitute for any testing you may need to conduct to determine for yourself the suitability of a specific material for your particular purposes. Since we cannot anticipate all variations in actual end-use conditions, 3DXTech makes no warranties and assumes no liability in connection with any use of this information.




Highly durable, flexible material.

Nylon has high impact and abrasion resistance; offering a high amount of tensile strength whilst also being a flexible material. It is one of the most heat-stable filaments, remaining unchanged in high temperature environments. 

It is hygroscopic, meaning that the filament will absorb moisture easily which will cause prints to warp and fail. This can be circumvented by keeping the filament in an air-tight, dry environment. Nylon can warp easily; depending on the printer and slicer used, some trial and error may be needed to prevent this. Printed items will degrade from UV radiation if left in sunlight for long periods of time.

Used for: Gears, Screws, and Cable ties.

Some manufacturers provide PA6 & PA12 Nylons, PA12 has increased moisture stability and is more resistant to moisture absorption. The same applies to Nylon 66 compared to Nylon 6.




Very High





Recommended Settings

Print Temp

225°C -265°C

Cooling Fan Off

Temp may vary on brand

Bed Temp

70°C – 90°C

Temp may vary on brand

Print Surface

Heated Bed Required
Enclosure Required

Example Prints

Additional information

Weight0.5 kg
Filament Brand


Filament Colour


Filament Diameter


Filament Type

Carbon Fibre, Nylon

Filament Weight


Filament Range

3DXTech Obsidion PA6-CF

Filament Weight


1 review for 3DXTech Obsidian PA6+CF 1.75mm 1kg [Markforged ONYX Alternative]

  1. 5 out of 5

    Martin Wiesner

    Obsidian works very well on my Markforged. It prints neatly and is more rigid than Onyx which is a huge bonus. Layer adhesion is excellent. I also tried it on non-Markforged machines and it printed well, albeit after some tuning. I manufacture end-use parts for the automotive industry and find Obsidian ideal for low volume production, especially on Markforged machines.

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