3D Printing Info

Filament comparison

PC-CF vs PLA Stone

Compare printing settings, strength, heat resistance, dated prices and sources.

Carbon-fibre PC (PC-CF) guideStone-filled PLA guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PC-CF comparisonsMore PLA Stone comparisons
PC-CF vs PLA Stone — documented properties and sources
PropertyCarbon-fibre PC (PC-CF)PCStone-filled PLAPLA
Market snapshot
Listing priceUSD/kg; dated snapshots$62.58/kg median; $34.99–$117.33/kg across 6 dated product listings$22.99/kg median; $15.99–$49.16/kg across 6 dated product listings
Identity & Market
Base polymer / chemistryPolycarbonate reinforced with chopped carbon fibre[1][2]PLA filled with stone or mineral powder — Formfutura StoneFil declares 40–50 wt% stone powder[3][4]
Densityg/cm³1.22 (Prusament) and 1.36 (3DXTech), ISO 1183[1][2]1.22 (Bambu Lab PLA Marble) and 1.50–1.70 (Formfutura StoneFil), ISO 1183[4][3]
Typical priceUSD/kg1 kg-equivalent spools span 35–117; the middle of the market is about 63[5][6][7][8][9]1 kg spools cluster near 21[10][11]
Price range across brandsUSD/kg35–117 across brands; Ambrosia 35, IEMAI 39, YXPOLYER 55, Spectrum PC CF 70, Prusament 94, 3DXTech 117[5][6][7][8][9]16–49 across brands; SUNLU 16, ELEGOO 19, Polymaker 21, Bambu Lab 25, Prusament 38, Filament PM MarbleJet 49 on 0.5 kg spools[12][11][10][5][13][14]
Market availability1–5Available from several mainstream brands[5][7][15]Stocked by most mainstream brands[10][11][12]
Spool sizes & diameters1.75 and 2.85 mm; 0.75, 0.8 and 1 kg spools[5][7]1.75 and 2.85 mm; 0.5 and 1 kg spools plus refills[11][3]
Typical applicationsStiff high-temperature structural parts — jigs, drone frames and under-bonnet brackets[1][2]Architectural models, sculpture and props with a matte mineral surface[4]
Diameter tolerance± mm±0.04 (Prusament PC Blend Carbon Fiber)[1]Not documented
Printing Parameters
Nozzle temperature°C285 ± 10 (Prusament)[1]190–230 (Bambu Lab)[4]
Bed temperature°C110 ± 10 (Prusament)[1]35–45 (Bambu Lab)[4]
Enclosure / chamber requirement1–5Enclosure required (passive)[1][16]Open frame is fine[4]
Part cooling fanOff — Prusa allows 0–20 % and warns cooling significantly reduces interlayer adhesion[1]Fan on[4]
Bed surface & adhesion aidPEI with a glue stick or a commercial adhesive[17]Not documented
Warping tendency1–5High — enclosure needed for reliable large parts; the fibre reduces warping against unfilled PC[1][16]Not documented
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[17][18]Not documented
Stringing / oozing tendency1–5Moderate — retraction tuning needed; Polymaker flags stringing as a common PC problem[18]Not documented
Overall printing difficulty1–5Advanced — enclosure, hardware upgrades, tuning; hardened nozzle mandatory[16][1]Easy — minor profile tuning; 0.2 mm nozzles are not usable[19]
Extruder requirementNot documentedNozzles below 0.4 mm are not compatible (Bambu Lab)[19]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required[16]Brass acceptable; hardened steel for volume work — Bambu Lab's compatibility table says no hardened nozzle is needed while the note under the same table groups PLA Marble with particle-filled materials that should always use one[19]
Abrasiveness1–5Highly abrasive — standard CF composite[16]Moderately abrasive — stone fill[19][3]
Nozzle clog risk1–5High — jams from moisture, heat creep or particles; PC already absorbs water from the air and 3DXTech adds a hardened 0.4 mm minimum nozzle, 0.25 mm layers and a 120 °C pre-dry[20][17][21]Moderate — needs dry filament and a clean nozzle[19]
Heat-creep / jam sensitivity1–5Slightly sensitive[17]Not documented
Hotend requirementAll-metal hot end required (Simplify3D)[17]Not documented
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Low (0.1–0.3 %) — the PC matrix takes up 0.15–0.25 % and 3DXTech specifies a 120 °C, 4 h pre-dry[22][23][20]Moderate — 0.44 % saturated at 25 °C / 55 % RH[4]
Equilibrium moisture content at ~50 % RH%0.11 after 7 days at 24 °C / 22 % RH (Prusa Polymers)[1]0.44 saturated at 25 °C / 55 % RH (Bambu Lab)[4]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[24]Not documented
Effect of moisture on strengthNo dry-versus-conditioned figures are published. Polymaker calls PC highly hygroscopic and requires a 70–80 °C dry for 6–8 h; run wet, the loss shows as surface defects and poor layer adhesion[18][24]Polymaker rates PLA low-sensitivity and publishes no dry-versus-conditioned figures for this grade; absorbed water flashes to steam and shows as bubbling and poor layer adhesion[24]
Storage requirementAirtight containers with desiccant to prevent reabsorption[18]Not documented
Mechanical Properties
Tensile strength (XY)MPa64 ± 3 printed horizontal and 70 ± 3 printed vertical at yield, ISO 527-1 (Prusament); 3DXTech quotes 73 at break[1][2]33 ± 4 printed XY, ISO 527 (Bambu Lab)[4]
Young's modulusMPa2600 printed horizontal and 3200 printed vertical, ISO 527-1 (Prusament); 3DXTech quotes 6980[1][2]2330 ± 240 printed XY, ISO 527 (Bambu Lab)[4]
Elongation at break%4.6 at yield printed horizontal (Prusament); 3DXTech quotes 2.1 at break[1][2]6.7 ± 0.5 printed XY, ISO 527 (Bambu Lab)[4]
Flexural strengthMPa94 ± 3 printed horizontal and 130 ± 2 printed vertical, ISO 178 (Prusament); 3DXTech quotes 85[1][2]75 ± 5 printed XY, ISO 178 (Bambu Lab)[4]
Flexural modulusMPa3500 printed horizontal and 4200 printed vertical, ISO 178 (Prusament); 3DXTech quotes 6540[1][2]2920 ± 180 printed XY, ISO 178 (Bambu Lab)[4]
Charpy impact, notchedkJ/m²12 ± 1 printed horizontal and 17 ± 2 printed vertical, ISO 179-1 notched (Prusament)[1]9.5 ± 2.6 printed XY, ISO 179, notched (Bambu Lab)[4]
Other impact dataCharpy unnotched 32 ± 5 printed horizontal and 35 ± 4 printed vertical (Prusament, ISO 179-1)[1]Charpy unnotched 24.0 printed XY (Bambu Lab, ISO 179)[4]
Layer adhesion / Z tensileMPa23 ± 2 (Prusa Polymers interlayer adhesion test) — above the 21 ± 2 of unfilled Prusament PC Blend[1][23]30 ± 4 printed Z, ISO 527 (Bambu Lab)[4]
Brittleness1–5Moderate[1][2]Brittle — snaps with little warning[4]
Hardness (scale-specific)Shore A / Shore D / Rockwell83 Shore D (Prusa Polymers method), against 79 for unfilled Prusament PC Blend[1][23]Not documented
Creep resistance / sustained load1–5Excellent — holds load for years. Room-temperature tensile creep of moulded unfilled PC ran unbroken at 41 MPa until the test was stopped; short carbon fibre raises the flexural modulus from about 2.1 to 3.5-6.5 GPa, which reduces creep strain further[25][1]Poor — no stone-filled creep test; plain printed PLA sagged from 12 to 16.2–21.8 mm over 5 days at 1.25 kg[26][27][28]
Fatigue / repeated-flex resistance1–5Good. No fatigue test data was found for a carbon-fibre PC filament; the unfilled polymer is rated Good on the same scale[25]Poor — no grade-specific S-N curve; plain printed PLA ran 38 000–49 000 cycles at 30 % of tensile strength and the mineral filler leaves a brittle compound[29][4]
Elasticity / flexibility1–5Rigid[1]Rigid[4]
Z strength as % of XY%Not documented91 by tensile, 73 by flexural (printed, Bambu Lab)[4]
Thermal Properties
HDT at 0.45 MPa°C114 (ISO 75, 0.45 MPa, Prusament)[1]56 (ISO 75, 0.45 MPa)[4]
HDT at 1.8 MPa°C106 (ISO 75, 1.8 MPa, Prusament), against 93 for unfilled Prusament PC Blend[1][23]53 (ISO 75, 1.8 MPa)[4]
Glass transition (Tg)°C127 (3DXTech, DSC)[2]56 (DSC)[4]
Melting point / Vicat°CNot documented156 peak melt (DSC); Formfutura gives a 120–170 melting range for StoneFil[4][3]
Continuous service temperature°C113 — Prusa publishes this as the temperature resistance of Prusament PC Blend[23]Not documented
Environment & Chemical
UV resistance1–5Degrades within weeks outdoors unless stabilised[18]Degrades within weeks outdoors[30]
Chemical resistanceWithstands oils, solvents and fuels; Polymaker rates it good against weak acids[18]Not documented
Food contactBisphenol-A polycarbonate is not offered as food-contact filament[18]Not documented
Biodegradability / compostabilityNot biodegradable[18]Not documented
RecyclabilityMechanically recyclable but not accepted in household plastic collection[18]Not documented
Electrical & ESD propertiesSurface resistance above 10⁹ ohm/sq — not static-dissipative (3DXTech, ASTM D257)[2]Not documented
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[31]Low hazard — minimal VOC and particle emission[31]
Ultrafine-particle emission rateparticles/min≈4 × 10¹⁰ median — the highest ultrafine-particle rate of the nine filaments in the chamber study, above every ABS tested[31]Not documented
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[31][16]None needed in a normal room[31]
Dust & fibre handling hazardCarbon fibre is bound in the matrix; sanding dust should not be inhaled[2]Formfutura's SDS sets an occupational limit of 1 mg/m³ for the stone powder and lists it as both a fibre and a particulate — do not dry-sand without extraction[3]
Post-Processing
Sanding & machiningSands and machines well; the toughness means it cuts rather than chips[17]Sands to a stone-like matte surface[3]
Gluing & solvent weldingCyanoacrylate; dichloromethane solvent-welds PC but is a laboratory reagent[17]Not documented
Vapour / chemical smoothingNo practical vapour smoothing[17]Not documented
Support material pairingPrints its own supports; 3DXTech sells a dedicated PC break-away support[17]Support for PLA (Bambu Lab)[4]
Dimensional accuracy & detailNot documentedMatte mineral surface hides layer lines; 55° overhangs and 30 mm bridges as for plain PLA[4]
Solvents & Solubility
Soluble inDichloromethane and chloroform dissolve the matrix and leave the fibre; DMF and dioxane do the same (Covestro).[32]Chloroform dissolves the PLA matrix (10 % w/v, 2–4 h at 23 °C) and leaves the filler as loose sludge; laboratory reagent.[33]
Softened or crazed byMethanol, butyl acetate, ether, 1 % NaOH and phthalate plasticisers stress-crack it; acetone, MEK and xylene swell it.[32]Acetone, ethyl acetate and toluene plasticise the matrix but dissolve <1 % even at 65 °C; acetone submersion crazes parts.[33][34]
Solvent welding & smoothing agentDichloromethane cement welds the resin, but the fibre keeps the joint from flowing closed. Controlled carcinogen.[35]Chloroform vapour attacks only the resin fraction, so the filler is left standing proud; no workshop-safe agent exists.[36][34]

Material entries describe families or representative grades, not an interchangeable specification for every spool. Test methods, orientations and conditions may differ. Unknown values are marked “Not documented”. Prices and source dates remain historical snapshots; check the linked guide for product details. Differences highlight text, not a universal winner.

Sources for this comparison

  1. Prusament PC Blend Carbon Fiber Technical Datasheet v2.0 Prusa Polymers · 2023-04 · tds
  2. CarbonX Carbon Fiber ezPC Polycarbonate Technical Data Sheet 3DXTech · 2026-08 · tds
  3. StoneFil safety data sheet Formfutura · 2026-08 · msds
  4. Bambu Filament Technical Data Sheet — PLA Marble Bambu Lab · 2026-08 · tds
  5. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  6. Spectrum PC CF Carbon Black, 1.75 mm / 250 g 3DJAKE · 2026-08 · vendor
  7. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  8. IEMAI CF-PC 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  9. YXPOLYER PC CF product page YXPOLYER · 2026-08 · vendor
  10. PLA Marble — product page Bambu Lab US Store · 2026-08 · vendor
  11. Polymaker product catalogue Polymaker · 2026-08 · vendor
  12. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  13. SUNLU High Speed PLA Marble 3D Printer Filament 1 kg SUNLU · 2026-08 · vendor
  14. Filament PM PLA MarbleJet technical data sheet Filament PM (Plasty Mladec) · 2026-08 · tds
  15. Filastruder product catalogue Filastruder · 2026-08 · vendor
  16. ABS / ASA / PC Usage Guide Bambu Lab Wiki · 2026-08 · doc
  17. Polycarbonate — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  18. PC — material basics Polymaker Wiki · 2026-08 · doc
  19. PLA Usage Guide Bambu Lab Wiki · 2026-08 · doc
  20. CARBONX ezPC+CF — product page (print recommendations) 3DXTech · 2026-08 · doc
  21. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  22. Bambu Filament Technical Data Sheet V2.0 — PC Bambu Lab · 2026-08 · tds
  23. Prusament PC Blend Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  24. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  25. Experimental data for creep and dynamic mechanical properties of polycarbonate and polycarbonate/ABS Data in Brief 42:108264 · 2022-06 · paper
  26. BambuLab PLA Basic vs PLA Tough vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  27. Polymaker PLA Pro vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  28. Carbon Fiber PLA vs META-PLA vs PLA+ vs PLA by Sunlu — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  29. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  30. PLA — material guide Prusa Knowledge Base · 2026-08 · doc
  31. Emissions of Ultrafine Particles and Volatile Organic Compounds from Commercially Available Desktop Three-Dimensional Printers with Multiple Filaments (Azimi et al.) Environmental Science & Technology 50(3) 1260-1268 · 2016-01 · paper
  32. Makrolon — The chemical resistance (Makrolon 2800, 6 days at 23 °C and 50 °C) Covestro · 2016-12 · tds
  33. Solubility Study of Ingeo Biopolymer Grades in Common Organic Solvents (NWPD003) NatureWorks · 2019-10 · tds
  34. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  35. Weld-On 3 Acrylic Plastic Cement — technical data sheet (shipped as dichloromethane) IPS Corporation · 2002-07 · tds
  36. Effect of vapour smoothing in trichloromethane on 3D printed PLA — surface, mechanical and chemical structure Pitale, Keche & Chopra, Engineering Research Express 6(4) 045579 · 2024-12 · paper