3D Printing Info

Filament comparison

PET-CF vs PLA Glow

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

Carbon-fibre PET (PET-CF) guideGlow-in-the-dark PLA guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PET-CF comparisonsMore PLA Glow comparisons
PET-CF vs PLA Glow — documented properties and sources
PropertyCarbon-fibre PET (PET-CF)PETGGlow-in-the-dark PLAPLA
Market snapshot
Listing priceUSD/kg; dated snapshots$39.99/kg median; $26.00–$49.98/kg across 4 dated product listings$24.99/kg median; $19.99–$49.16/kg across 5 dated product listings
Identity & Market
Base polymer / chemistrySemi-crystalline PET reinforced with carbon fibre — a different polymer from PETG-CF, with the glycol modifier removed so the matrix can crystallise[1][2]PLA with a phosphorescent additive at 2–20 wt% (Bambu Lab SDS, filler not named)[3]
Densityg/cm³1.29 (Bambu Lab) and 1.34 (Fiberon PET-CF17), ISO 1183[1][2]1.24 (colorFabb) to 1.26 (Bambu Lab), ISO 1183[4][5]
Typical priceUSD/kg1 kg spools cluster near 45[1][6]1 kg spools cluster near 25[7][8]
Price range across brandsUSD/kg26–50 across brands; ELEGOO 26 in a 5 kg pack, Bambu Lab 45, Fiberon 50[9][1][6]20–49 across brands; ELEGOO 20, Bambu Lab 25, Polymaker 25, Filament PM 49 on 0.5 kg spools[9][7][8][10]
Market availability1–5Available from several mainstream brands[1][6][9]Stocked by most mainstream brands[7][8][9]
Spool sizes & diameters1.75 mm; 0.5 and 1 kg spools[6][1]1.75 and 2.85 mm; 0.75 and 1 kg spools[6][5]
Typical applicationsLoad-bearing parts that must survive above PETG's 70 °C ceiling without moving to PA or PC[1][2]Signage, novelty and cosplay parts that glow after light exposure[4]
Printing Parameters
Nozzle temperature°C260–290 (Bambu Lab)[1]190–230 on the Bambu Lab TDS against 210–240 in its own material table; colorFabb advises 195–220[4][11][5]
Bed temperature°C80–100 (Bambu Lab)[1]35–45 (Bambu Lab); 50–60 (colorFabb)[4][5]
Enclosure / chamber requirement1–5Enclosure recommended — Bambu Lab specifies a 45–60 °C chamber[1]Open frame is fine[4]
Recommended chamber temperature°C45–60 (Bambu Lab)[1]Not documented
Part cooling fan0–60 % (Bambu Lab)[1]Fan on; colorFabb allows 0–100 %[4][5]
Bed surface & adhesion aidTextured PEI, satin or powder-coated sheets; on smooth PEI a glue stick acts as a release agent[12][13]Not documented
Maximum volumetric flow (mm³/s; see test conditions)mm³/s8 at Bambu Lab's 100 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer — half the speed it allows for PETG-CF[1][14]Not documented
Bed-adhesion difficulty1–5Needs the right surface or a thin adhesive — the problem is releasing the part, not sticking it[12][13]Not documented
Stringing / oozing tendency1–5Moderate — retraction tuning needed; Polymaker names stringing as PETG's common quirk[13]Not documented
Overall printing difficulty1–5Advanced — enclosure, hardware upgrades, tuning[1]Easy — minor profile tuning; a hardened nozzle is mandatory[11][8]
Extruder requirementNot documentedBambu Lab: hardened steel and high-flow nozzles only, 0.2 mm excluded, AMS lite not compatible[11]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required[1]Hardened steel required[11][8][5]
Abrasiveness1–5Highly abrasive — standard CF composite[1]Highly abrasive — the phosphor is a hard ceramic; Bambu Lab groups glow with carbon fibre as the materials that wear nozzles and grind AMS PTFE, and both Bambu Lab and Polymaker require a hardened nozzle[11][5]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for carbon-filled composites[15]Moderate — needs dry filament and a clean nozzle[11]
Heat-creep / jam sensitivity1–5Slightly sensitive[16]Not documented
Hotend requirementNo special hot-end required[16]Hardened steel nozzle; Bambu Lab lists glow-in-the-dark among the filaments its hardened-steel nozzle exists for[17][11]
Other hardware wearNot documentedBambu Lab reports the filament adds enough feeding resistance to fail prints on the AMS lite; colorFabb warns of brass nozzle wear[11][5]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Moderate — 0.37 % saturated at 25 °C / 55 % RH (Bambu Lab); 0.53 % equilibrium (Fiberon)[1][2]Moderate — 0.46 % saturated at 25 °C / 55 % RH[4]
Equilibrium moisture content at ~50 % RH%0.37 saturated at 25 °C / 55 % RH (Bambu Lab); 0.53 equilibrium (Fiberon PET-CF17)[1][2]0.46 saturated at 25 °C / 55 % RH (Bambu Lab)[4]
Drying temperature & time80 °C for 8–12 h (Bambu Lab) — the longest and hottest dry in the polyester family; Fiberon specifies 100 °C for 10 h[1][2]Not documented
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[18]Not documented
Effect of moisture on strengthBambu Lab publishes its whole mechanical table under the heading "Mechanical Properties (Dry state)" — the quoted figures apply only to dried filament[1]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[18]
Storage requirementSealed with desiccant; Polymaker groups PETG with the highly hygroscopic materials[18][13]Not documented
Hydrolysis at melt temperatureThe 80–100 °C dry both suppliers mandate is far above the 55–65 °C used for PETG, consistent with a melt-hydrolysis risk in the semi-crystalline PET matrix; neither publishes a molecular-weight loss figure[1][2]Not documented
Mechanical Properties
Tensile strength (XY)MPa65.9 (Fiberon) to 74 (Bambu Lab) printed XY, ISO 527[1][2]32 ± 3 printed XY, ISO 527 (Bambu Lab); colorFabb quotes 61.5 by ISO 527 on its own specimens[4][5]
Young's modulusMPa4730 ± 260 (Bambu Lab) and 5481 ± 224 (Fiberon) printed XY, ISO 527[1][2]2030 ± 210 printed XY, ISO 527 (Bambu Lab); colorFabb 2960[4][5]
Elongation at break%2.4 ± 0.5 printed XY, ISO 527 (Fiberon PET-CF17)[2]8.6 ± 1.2 printed XY, ISO 527 (Bambu Lab); colorFabb 10.5 at break[4][5]
Flexural strengthMPa109.3 ± 2.0 printed XY, ISO 178 (Fiberon PET-CF17)[2]76 ± 4 printed XY, ISO 178 (Bambu Lab)[4]
Flexural modulusMPa4744 ± 136 printed XY, ISO 178 (Fiberon PET-CF17)[2]2640 ± 130 printed XY, ISO 178 (Bambu Lab); colorFabb 3295[4][5]
Charpy impact, notchedkJ/m²5.1 ± 0.2 printed XY, ISO 179 notched (Fiberon PET-CF17); unnotched 25.1 ± 2.8[2]2.8 (colorFabb, ISO 179-1/1eA) and 8.8 ± 1.7 (Bambu Lab, ISO 179) printed XY, notched[4][5]
Other impact dataNot documentedCharpy unnotched 27.3 (Bambu Lab) and 30.8 (colorFabb), printed, ISO 179[4][5]
Layer adhesion / Z tensileMPa27.9 (Fiberon) and 35 ± 5 (Bambu Lab) printed Z, ISO 527[1][2]26 ± 3 printed Z, ISO 527 (Bambu Lab)[4]
Brittleness1–5Very brittle — elongation at break 2.4 % in XY and 0.8 % in Z[2]Brittle — snaps with little warning[4]
Creep resistance / sustained load1–5Good — no creep test found; annealed PET-CF holds a 105 °C HDT at 1.8 MPa and a 4730–5481 MPa modulus against 1500–2311 for PETG[2][1]Poor — no glow-grade creep test; plain printed PLA sagged from 12 to 16.2–21.8 mm over 5 days at 1.25 kg[19][20][21]
Fatigue / repeated-flex resistance1–5Below average — no S-N curve; elongation at break is 2.4 % in XY and 0.8 % in Z, against 5.2–9.3 % for unfilled PETG[2]Poor — no grade-specific S-N curve; plain printed PLA ran 38 000–49 000 cycles at 30 % of tensile strength and the glow filler leaves a brittle, highly abrasive compound[22][4]
Elasticity / flexibility1–5Rigid[1]Rigid[4]
Z strength as % of XY%42 (Fiberon) to 47 (Bambu Lab), printed[1][2]81 by tensile, 72 by flexural (printed, Bambu Lab)[4]
Thermal Properties
HDT at 0.45 MPa°C147.5 (Fiberon) and 205 (Bambu Lab), ISO 75 at 0.45 MPa[1][2]55 (ISO 75, 0.45 MPa)[4]
HDT at 1.8 MPa°C105 (Fiberon) and 182 (Bambu Lab), ISO 75 at 1.8 MPa[1][2]52 (ISO 75, 1.8 MPa)[4]
Glass transition (Tg)°C75 (Bambu Lab) and 79.3 (Fiberon), DSC[1][2]55 (DSC)[4]
Melting point / Vicat°C241.3 (Fiberon) and 250 (Bambu Lab) melting, DSC; Vicat 226–238[1][2]155 peak melt (DSC); colorFabb quotes above 155 by ISO 3146-C[4][5]
Annealing responseThe PET matrix crystallises on annealing, which is what separates this grade from PETG-CF[2][1]Not documented
Flammability / UL 94Flammable; no UL 94 rating published for standard grades[23]Not documented
Environment & Chemical
UV resistance1–5Not documentedDegrades within weeks outdoors[24]
Chemical resistanceWithstands acids, alkalis, oils and UV exposure[13]Not documented
Food contactNot certified for food contact as filament[13]Not documented
Biodegradability / compostabilityNot biodegradable[13]Not documented
RecyclabilityNot accepted in household plastic collection[13]Not documented
Electrical & ESD propertiesSurface resistivity above 10¹² ohm — insulating (Fiberon PET-CF17, ANSI/ESD S11.11)[2]Not documented
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[25]Low hazard — minimal VOC and particle emission[25]
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[25][1]None needed in a normal room[25]
Dust & fibre handling hazardCarbon fibre is bound in the matrix; sanding dust should not be inhaled[2]Not documented
Post-Processing
Sanding & machiningSands poorly — the material is tough and gums rather than powders[16]Not documented
Gluing & solvent weldingCyanoacrylate; no common solvent welds PETG cleanly[16]Not documented
Vapour / chemical smoothingNo practical vapour smoothing[16]Not documented
Support material pairingPrints its own supports; Polymaker rates PolyDissolve S1 for PETG[16]Support for PLA (Bambu Lab)[4]
Dimensional accuracy & detailBambu Lab markets it on low warping and shrinkage relative to other high-temperature composites[1]Glow brightness rises with wall thickness; 0.2 mm nozzles are not usable[11]
Solvents & Solubility
Soluble inNone common; fluorinated solvents such as hexafluoroisopropanol dissolve linear polyester at 23 °C. Laboratory only.[26][27]Chloroform dissolves the PLA matrix (10 % w/v, 2–4 h at 23 °C) and leaves the filler as loose sludge; laboratory reagent.[28]
Softened or crazed byEnsinger rates polyester not resistant to chloroform or dichloromethane and only conditionally resistant to acetone and MEK.[27]Acetone, ethyl acetate and toluene plasticise the matrix but dissolve <1 % even at 65 °C; acetone submersion crazes parts.[28][29]
Solvent welding & smoothing agentDichloromethane attacks polyester and can be brushed on, but the carbon fibre blocks any useful surface flow.[27][29]Chloroform vapour attacks only the resin fraction, so the filler is left standing proud; no workshop-safe agent exists.[30][29]

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. Bambu Filament Technical Data Sheet — PET-CF Bambu Lab · 2026-08 · tds
  2. Fiberon PET-CF17 Technical Data Sheet V1.0 Polymaker · 2026-08 · tds
  3. Safety Data Sheet SDS20251127A12 — Bambu PLA Glow Bambu Lab · 2025-11 · msds
  4. Bambu Filament Technical Data Sheet — PLA Glow Bambu Lab · 2026-08 · tds
  5. glowFill technical data sheet colorFabb · 2026-08 · tds
  6. Polymaker product catalogue Polymaker · 2026-08 · vendor
  7. PLA Glow — product page Bambu Lab US Store · 2026-08 · vendor
  8. Panchroma Luminous PLA — product page Polymaker Shop · 2026-08 · vendor
  9. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  10. Filament PM PLA GlowJet technical data sheet Filament PM (Plasty Mladec) · 2026-08 · tds
  11. PLA Usage Guide Bambu Lab Wiki · 2026-08 · doc
  12. Prusament PETG Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  13. PETG — material basics Polymaker Wiki · 2026-08 · doc
  14. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  15. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  16. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  17. Nozzles — material and compatibility Bambu Lab Wiki · 2026-08 · doc
  18. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  19. BambuLab PLA Basic vs PLA Tough vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  20. Polymaker PLA Pro vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  21. Carbon Fiber PLA vs META-PLA vs PLA+ vs PLA by Sunlu — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  22. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  23. Prusament PETG V0 Technical Datasheet Prusa Polymers · 2026-08 · tds
  24. PLA — material guide Prusa Knowledge Base · 2026-08 · doc
  25. 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
  26. Resistance of Ultramid, Ultraform and Ultradur to chemicals (TI-KTU/AS-28 e) BASF · 2000-10 · tds
  27. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  28. Solubility Study of Ingeo Biopolymer Grades in Common Organic Solvents (NWPD003) NatureWorks · 2019-10 · tds
  29. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  30. 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