3D Printing Info

Filament comparison

PLA-GF vs PLA Stone

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

Glass-fibre PLA (PLA-GF) guideStone-filled PLA guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PLA-GF comparisonsMore PLA Stone comparisons
PLA-GF vs PLA Stone — documented properties and sources
PropertyGlass-fibre PLA (PLA-GF)PLAStone-filled PLAPLA
Market snapshot
Listing priceUSD/kg; dated snapshots$44.99/kg median; $29.99–$59.99/kg across 2 dated product listings$22.99/kg median; $15.99–$49.16/kg across 6 dated product listings
Identity & Market
Base polymer / chemistryPLA filled with chopped glass fibre — 12 wt% (Polymaker HT-PLA-GF), 15–20 wt% (eSUN PLA-GF). Bambu Lab PLA Galaxy uses glass microspheres, not fibre, and is not equivalent[1][2][3]PLA filled with stone or mineral powder — Formfutura StoneFil declares 40–50 wt% stone powder[4][5]
Densityg/cm³1.31 (eSUN) to 1.337 (Polymaker), ISO 1183 / GB/T 1033[1][2]1.22 (Bambu Lab PLA Marble) and 1.50–1.70 (Formfutura StoneFil), ISO 1183[5][4]
Typical priceUSD/kg1 kg spools cluster near 30[6][7]1 kg spools cluster near 21[8][9]
Price range across brandsUSD/kg30–60 across brands; Polymaker 30, Proto-pasta 60[6][7]16–49 across brands; SUNLU 16, ELEGOO 19, Polymaker 21, Bambu Lab 25, Prusament 38, Filament PM MarbleJet 49 on 0.5 kg spools[10][9][8][11][12][13]
Market availability1–5Niche, a handful of specialist brands[6][7][2]Stocked by most mainstream brands[8][9][10]
Spool sizes & diameters1.75 mm; 0.5 and 1 kg spools[7][9]1.75 and 2.85 mm; 0.5 and 1 kg spools plus refills[9][4]
Typical applicationsStiff brackets and fixtures; the Polymaker grade is aimed at parts annealed for heat resistance[1]Architectural models, sculpture and props with a matte mineral surface[5]
Printing Parameters
Nozzle temperature°C210–230 (Polymaker HT-PLA-GF)[1]190–230 (Bambu Lab)[5]
Bed temperature°C25–60 (Polymaker HT-PLA-GF)[1]35–45 (Bambu Lab)[5]
Enclosure / chamber requirement1–5Open frame is fine[1]Open frame is fine[5]
Part cooling fanFan on — eSUN specifies 100 %[2]Fan on[5]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s28 at Polymaker's stated 350 mm/s on a 0.4 mm nozzle at 0.2 mm layer; eSUN prints its specimens at 60 mm/s[1][2][14]Not documented
Shrinkage%0.05 in X-Y and Z, 0.10 diagonal (Polymaker HT-PLA-GF)[1]Not documented
Overall printing difficulty1–5Intermediate — dry filament and a tuned profile; hardened nozzle mandatory[1]Easy — minor profile tuning; 0.2 mm nozzles are not usable[15]
Extruder requirementNot documentedNozzles below 0.4 mm are not compatible (Bambu Lab)[15]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required[1]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[15]
Abrasiveness1–5Highly abrasive — standard GF composite[1]Moderately abrasive — stone fill[15][4]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[16]Moderate — needs dry filament and a clean nozzle[15]
Hotend requirementHardened steel or ruby nozzle; Polymaker's own slicer preset sets a minimum nozzle hardness of 40 HRC[1]Not documented
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Moderate — the PLA matrix takes up 0.40–0.51 % saturated; no glass-filled grade publishes its own figure[17][18]Moderate — 0.44 % saturated at 25 °C / 55 % RH[5]
Equilibrium moisture content at ~50 % RH%Not documented0.44 saturated at 25 °C / 55 % RH (Bambu Lab)[5]
Drying temperature & time60 °C for 6 h (Polymaker HT-PLA-GF)[1]Not documented
Effect of moisture on strengthPolymaker 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[19]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[19]
Mechanical Properties
Tensile strength (XY)MPa50.1 as printed and 50.2 annealed, printed XY, ISO 527 (Polymaker); eSUN quotes 59.3 by GB/T 1040[1][2]33 ± 4 printed XY, ISO 527 (Bambu Lab)[5]
Young's modulusMPa3794 as printed, 4207 annealed, printed XY, ISO 527 (Polymaker)[1]2330 ± 240 printed XY, ISO 527 (Bambu Lab)[5]
Elongation at break%2.77 as printed, 2.3 annealed, printed XY, ISO 527 (Polymaker); eSUN quotes 7.99[1][2]6.7 ± 0.5 printed XY, ISO 527 (Bambu Lab)[5]
Flexural strengthMPa86.4 printed XY, ISO 178 (Polymaker)[1]75 ± 5 printed XY, ISO 178 (Bambu Lab)[5]
Flexural modulusMPa3685 printed XY, ISO 178 (Polymaker); eSUN quotes 4415 flexural modulus by GB/T 9341[1][2]2920 ± 180 printed XY, ISO 178 (Bambu Lab)[5]
Charpy impact, notchedkJ/m²5.31 ± 0.46 as printed and 4.92 ± 0.50 annealed (printed XY, ISO 179, notched); Z 4.28 ± 0.18[1]9.5 ± 2.6 printed XY, ISO 179, notched (Bambu Lab)[5]
Other impact dataIzod 10.16 kJ/m² (eSUN, GB/T 1843)[2]Charpy unnotched 24.0 printed XY (Bambu Lab, ISO 179)[5]
Layer adhesion / Z tensileMPa23.7 as printed, 22.5 annealed, printed Z, ISO 527 (Polymaker)[1]30 ± 4 printed Z, ISO 527 (Bambu Lab)[5]
Brittleness1–5Very brittle — elongation at break 2.77 % in XY and 0.85 % in Z[1]Brittle — snaps with little warning[5]
Creep resistance / sustained load1–5Poor — no GF-grade creep test; plain printed PLA sagged from 12 to 16.2–21.8 mm over 5 days at 1.25 kg[20][21][22]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[20][21][22]
Fatigue / repeated-flex resistance1–5Poor — no grade-specific S-N curve; plain printed PLA ran 38 000–49 000 cycles at 30 % of tensile strength and elongation at break falls to 2.77 % in XY and 0.85 % in Z[23][1]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[23][5]
Elasticity / flexibility1–5Rigid[1]Rigid[5]
Z strength as % of XY%47 as printed (23.7 Z against 50.1 XY), printed[1]91 by tensile, 73 by flexural (printed, Bambu Lab)[5]
Wear resistance & frictioneSUN describes high wear resistance and positions the grade for wear parts[2]Not documented
Thermal Properties
HDT at 0.45 MPa°C75.5 as printed, 114.7 after annealing (ISO 75, 0.45 MPa) — the point of the material[1]56 (ISO 75, 0.45 MPa)[5]
HDT at 1.8 MPa°C59.7 as printed, 84 after annealing (ISO 75, 1.8 MPa)[1]53 (ISO 75, 1.8 MPa)[5]
Glass transition (Tg)°C59.8 (DSC)[1]56 (DSC)[5]
Melting point / Vicat°C174.9 peak melt (DSC); Vicat 148.9 as printed, 148.3 annealed[1]156 peak melt (DSC); Formfutura gives a 120–170 melting range for StoneFil[5][4]
Annealing responseAnnealing lifts HDT at 0.45 MPa from 75.5 to 114.7 °C and modulus from 3794 to 4207 MPa[1]Not documented
Environment & Chemical
UV resistance1–5Degrades within weeks outdoors[24]Degrades within weeks outdoors[24]
Health & Safety
Fume toxicity1–5Low hazard — minimal VOC and particle emission[25]Low hazard — minimal VOC and particle emission[25]
Ventilation / filtration requirement1–5None needed in a normal room[25]None needed in a normal room[25]
Dust & fibre handling hazardGlass fibre is bound in the matrix; avoid inhaling sanding dust[4]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[4]
Post-Processing
Sanding & machiningNot documentedSands to a stone-like matte surface[4]
Support material pairingNot documentedSupport for PLA (Bambu Lab)[5]
Dimensional accuracy & detailNear-zero shrinkage — 0.05 % in X-Y and Z (Polymaker)[1]Matte mineral surface hides layer lines; 55° overhangs and 30 mm bridges as for plain PLA[5]
Solvents & Solubility
Soluble inChloroform dissolves the PLA matrix (10 % w/v, 2–4 h at 23 °C) and leaves the filler as loose sludge; laboratory reagent.[26]Chloroform dissolves the PLA matrix (10 % w/v, 2–4 h at 23 °C) and leaves the filler as loose sludge; laboratory reagent.[26]
Softened or crazed byAcetone, ethyl acetate and toluene plasticise the matrix but dissolve <1 % even at 65 °C; acetone submersion crazes parts.[26][27]Acetone, ethyl acetate and toluene plasticise the matrix but dissolve <1 % even at 65 °C; acetone submersion crazes parts.[26][27]
Solvent welding & smoothing agentChloroform vapour attacks only the resin fraction, so the filler is left standing proud; no workshop-safe agent exists.[28][27]Chloroform vapour attacks only the resin fraction, so the filler is left standing proud; no workshop-safe agent exists.[28][27]

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. Polymaker HT-PLA-GF Technical Data Sheet V1.1 Polymaker · 2026-08 · tds
  2. eSUN ePLA-GF Technical Data Sheet V1.0 (Nov 2023) eSUN (copy hosted on 3d.nice-cdn.com) · 2023-11 · tds
  3. Bambu Filament Technical Data Sheet V1.0 — PLA Galaxy Bambu Lab · 2026-08 · tds
  4. StoneFil safety data sheet Formfutura · 2026-08 · msds
  5. Bambu Filament Technical Data Sheet — PLA Marble Bambu Lab · 2026-08 · tds
  6. Polymaker HT-PLA-GF — product page Polymaker Shop · 2026-08 · vendor
  7. Proto-pasta product catalogue Proto-pasta · 2026-08 · vendor
  8. PLA Marble — product page Bambu Lab US Store · 2026-08 · vendor
  9. Polymaker product catalogue Polymaker · 2026-08 · vendor
  10. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  11. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  12. SUNLU High Speed PLA Marble 3D Printer Filament 1 kg SUNLU · 2026-08 · vendor
  13. Filament PM PLA MarbleJet technical data sheet Filament PM (Plasty Mladec) · 2026-08 · tds
  14. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  15. PLA Usage Guide Bambu Lab Wiki · 2026-08 · doc
  16. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  17. Bambu Filament Technical Data Sheet V3.0 — PLA Basic Bambu Lab · 2026-08 · tds
  18. PolyLite PLA Technical Data Sheet V5.4 Polymaker · 2024-11 · tds
  19. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  20. BambuLab PLA Basic vs PLA Tough vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  21. Polymaker PLA Pro vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  22. Carbon Fiber PLA vs META-PLA vs PLA+ vs PLA by Sunlu — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  23. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  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. Solubility Study of Ingeo Biopolymer Grades in Common Organic Solvents (NWPD003) NatureWorks · 2019-10 · tds
  27. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  28. 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