3D Printing Info

Filament comparison

PA12-GF vs PLA Stone

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

Glass-fibre PA12 (PA12-GF) guideStone-filled PLA guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PA12-GF comparisonsMore PLA Stone comparisons
PA12-GF vs PLA Stone — documented properties and sources
PropertyGlass-fibre PA12 (PA12-GF)PAStone-filled PLAPLA
Market snapshot
Listing priceUSD/kg; dated snapshots$130.67/kg median; $46.00–$140.18/kg across 3 dated product listings$22.99/kg median; $15.99–$49.16/kg across 6 dated product listings
Identity & Market
Base polymer / chemistryPA12 reinforced with chopped glass fibre — 3DXTech's grade is nominally 30 wt%[1]PLA filled with stone or mineral powder — Formfutura StoneFil declares 40–50 wt% stone powder[2][3]
Densityg/cm³1.23 (ISO 1183)[1]1.22 (Bambu Lab PLA Marble) and 1.50–1.70 (Formfutura StoneFil), ISO 1183[3][2]
Typical priceUSD/kg1 kg-equivalent spools span 46–140; the middle of the market is about 88[4][5][6]1 kg spools cluster near 21[7][8]
Price range across brandsUSD/kg46–140 across brands; IEMAI 3D 46, 3DXTech 131 at 750 g and 130 at 2 kg, PrimaCreator NylonPower Glass Fiber 140 at 500 g[4][5][6]16–49 across brands; SUNLU 16, ELEGOO 19, Polymaker 21, Bambu Lab 25, Prusament 38, Filament PM MarbleJet 49 on 0.5 kg spools[9][8][7][10][11][12]
Market availability1–5Available from several mainstream brands[4][5]Stocked by most mainstream brands[7][8][9]
Spool sizes & diameters1.75 and 2.85 mm; 0.5, 0.75 and 2 kg spools[4][6]1.75 and 2.85 mm; 0.5 and 1 kg spools plus refills[8][2]
Typical applicationsStiff, humidity-stable structural parts — the glass gives the modulus, the PA12 matrix limits the moisture drift[1][13]Architectural models, sculpture and props with a matte mineral surface[3]
Printing Parameters
Nozzle temperature°CNot documented190–230 (Bambu Lab)[3]
Bed temperature°CNot documented35–45 (Bambu Lab)[3]
Enclosure / chamber requirement1–5Enclosure required (passive)[14]Open frame is fine[3]
Part cooling fanNot documentedFan on[3]
Bed surface & adhesion aidPEI sheet with a glue stick, or a dedicated adhesive such as Magigoo[15][14]Not documented
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[15]Not documented
Stringing / oozing tendency1–5Moderate — retraction tuning needed[14]Not documented
Overall printing difficulty1–5Advanced — enclosure, hardware upgrades, tuning[14]Easy — minor profile tuning; 0.2 mm nozzles are not usable[16]
Extruder requirementNot documentedNozzles below 0.4 mm are not compatible (Bambu Lab)[16]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — no nozzle-life figure is published for a PA12-GF30 grade; Polymaker measures about 9 h of brass nozzle life on its comparable fibre-filled nylons[17]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[16]
Abrasiveness1–5Highly abrasive — standard GF composite[17]Moderately abrasive — stone fill[16][2]
Nozzle clog risk1–5High — jams from moisture, heat creep or particles[18]Moderate — needs dry filament and a clean nozzle[16]
Heat-creep / jam sensitivity1–5Moderate — good heatbreak cooling needed[15]Not documented
Hotend requirementMay require an all-metal hot end (Simplify3D)[15]Not documented
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5High (0.8–2 %) — the PA12 matrix takes up far less than PA6, on the evidence of Polymaker's 1.5 % for PA12-CF10 against 3.33 % for PA6-GF25[19][20]Moderate — 0.44 % saturated at 25 °C / 55 % RH[3]
Equilibrium moisture content at ~50 % RH%Not documented0.44 saturated at 25 °C / 55 % RH (Bambu Lab)[3]
Effect of moisture on strengthPolymaker's PA12 grades change little between wet and dry, unlike PA6; the CoPA dry-to-wet blocks show the PA6-type response[13][21]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 below 20 % RH with desiccant[18]Not documented
Hydrolysis at melt temperaturePolymaker specifies an 80–100 °C dry and storage below 20 % RH; no molecular-weight loss figure is published, and the wet data it does publish is conditioning rather than melt hydrolysis[17][21]Not documented
Mechanical Properties
Tensile strength (XY)MPa82 at break (printed XY, ISO 527)[1]33 ± 4 printed XY, ISO 527 (Bambu Lab)[3]
Young's modulusMPa7800 (printed XY, ISO 527)[1]2330 ± 240 printed XY, ISO 527 (Bambu Lab)[3]
Elongation at break%4.5 at break (printed XY, ISO 527) — nearly double the 2.4 % of Polymaker's PA6-GF25[1][20]6.7 ± 0.5 printed XY, ISO 527 (Bambu Lab)[3]
Flexural strengthMPa94 (printed XY, ISO 178)[1]75 ± 5 printed XY, ISO 178 (Bambu Lab)[3]
Flexural modulusMPa7550 (printed XY, ISO 178)[1]2920 ± 180 printed XY, ISO 178 (Bambu Lab)[3]
Charpy impact, notchedkJ/m²Not documented9.5 ± 2.6 printed XY, ISO 179, notched (Bambu Lab)[3]
Other impact dataNot documentedCharpy unnotched 24.0 printed XY (Bambu Lab, ISO 179)[3]
Layer adhesion / Z tensileMPaNot documented30 ± 4 printed Z, ISO 527 (Bambu Lab)[3]
Brittleness1–5Moderate[1]Brittle — snaps with little warning[3]
Hardness (scale-specific)Shore A / Shore D / RockwellRockwell M88 / R117 on extruded PA66-GF30 stock (ASTM D785); no figure is published for a glass-fibre PA12 filament[22]Not documented
Creep resistance / sustained load1–5Good. Ensinger lists high creep resistance for extruded PA66-GF30 stock, and the PA12 matrix absorbs far less water than PA6, so a PA12-GF part holds load better in a humid environment[22][14]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[23][24][25]
Fatigue / repeated-flex resistance1–5Good. Ensinger lists high fatigue strength as a headline property of extruded PA66-GF30 stock[22]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[26][3]
Elasticity / flexibility1–5Rigid[1]Rigid[3]
Z strength as % of XY%Not documented91 by tensile, 73 by flexural (printed, Bambu Lab)[3]
Thermal Properties
HDT at 0.45 MPa°CNot documented56 (ISO 75, 0.45 MPa)[3]
HDT at 1.8 MPa°CNot documented53 (ISO 75, 1.8 MPa)[3]
Glass transition (Tg)°CNot documented56 (DSC)[3]
Melting point / Vicat°CNot documented156 peak melt (DSC); Formfutura gives a 120–170 melting range for StoneFil[3][2]
Thermal expansion (CTE)µm/m·K48.6 on extruded PA66-GF30 stock (ASTM D696; source states 2.7e-5 in/in/°F) — no figure is published for a glass-fibre PA12 filament[22]Not documented
Flammability / UL 94Flammable; no UL 94 rating published for the grades surveyed[17]Not documented
Environment & Chemical
UV resistance1–5Months outdoors before embrittlement — unstabilised polyamide yellows under UV[14]Degrades within weeks outdoors[27]
Chemical resistanceWithstands oils, fuels and alkalis[14]Not documented
Water / humidity resistance in service1–5Good — minor absorption relative to PA6-based composites[13]Not documented
Food contactNot food-contact certified as filament[14]Not documented
Biodegradability / compostabilityNot biodegradable[14]Not documented
RecyclabilityNot accepted in household plastic collection[14]Not documented
Electrical & ESD propertiesSurface resistance above 10¹³ ohm/sq — insulating (ASTM D257)[1]Not documented
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[28]Low hazard — minimal VOC and particle emission[28]
VOC emission rateµg/minUp to 180 caprolactam, the dominant VOC from nylon and the largest single-VOC rate in the study[28]Not documented
Ultrafine-particle emission rateparticles/min≈2 × 10⁸ median for nylon — low for particles despite the highest VOC mass measured[28]Not documented
Hazardous species emittedCaprolactam, at up to 180 µg/min from nylon filament[28]Not documented
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[28]None needed in a normal room[28]
Dust & fibre handling hazardGlass fibre is bound in the matrix; avoid inhaling sanding dust[1]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[2]
Post-Processing
Sanding & machiningSands poorly — gums rather than powders[15]Sands to a stone-like matte surface[2]
Gluing & solvent weldingCyanoacrylate; no common solvent welds polyamide[15]Not documented
Vapour / chemical smoothingNo practical vapour smoothing[15]Not documented
Support material pairingNot documentedSupport for PLA (Bambu Lab)[3]
Dimensional accuracy & detailNot documentedMatte mineral surface hides layer lines; 55° overhangs and 30 mm bridges as for plain PLA[3]
Solvents & Solubility
Soluble inFormic acid, phenol, m-cresol and hexafluoroisopropanol dissolve the matrix at 23 °C, leaving the fibre; laboratory reagents.[29]Chloroform dissolves the PLA matrix (10 % w/v, 2–4 h at 23 °C) and leaves the filler as loose sludge; laboratory reagent.[30]
Softened or crazed byZinc chloride solutions stress-crack the nylon matrix, alcoholic calcium chloride dissolves it, mineral acids attack it.[29]Acetone, ethyl acetate and toluene plasticise the matrix but dissolve <1 % even at 65 °C; acetone submersion crazes parts.[30][31]
Solvent welding & smoothing agentNone — nylon's only solvents (formic acid, phenol, HFIP) degrade the part, and the fibre blocks surface flow anyway.[29]Chloroform vapour attacks only the resin fraction, so the filler is left standing proud; no workshop-safe agent exists.[32][31]

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. FibreX PA12-GF30 Technical Data Sheet v1.0 3DXTech · 2026-08 · tds
  2. StoneFil safety data sheet Formfutura · 2026-08 · msds
  3. Bambu Filament Technical Data Sheet — PLA Marble Bambu Lab · 2026-08 · tds
  4. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  5. IEMAI 3D GF-PA12 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  6. PrimaCreator SELECT NylonPower Glass Fiber product page PrimaCreator · 2026-08 · vendor
  7. PLA Marble — product page Bambu Lab US Store · 2026-08 · vendor
  8. Polymaker product catalogue Polymaker · 2026-08 · vendor
  9. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  10. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  11. SUNLU High Speed PLA Marble 3D Printer Filament 1 kg SUNLU · 2026-08 · vendor
  12. Filament PM PLA MarbleJet technical data sheet Filament PM (Plasty Mladec) · 2026-08 · tds
  13. Moisture Conditioning — effect on printed nylon properties Polymaker Wiki · 2026-08 · doc
  14. PA (Nylon) — material basics Polymaker Wiki · 2026-08 · doc
  15. Nylon — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  16. PLA Usage Guide Bambu Lab Wiki · 2026-08 · doc
  17. Fiberon PA6-CF20 Technical Data Sheet V1.1 Polymaker · 2024-12 · tds
  18. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  19. Fiberon PA12-CF10 Technical Data Sheet V1.1 Polymaker · 2025-02 · tds
  20. Fiberon PA6-GF25 Technical Data Sheet V1.1 Polymaker · 2024-12 · tds
  21. PolyMide CoPA Technical Data Sheet V5.4 (dry and wet status blocks) Polymaker · 2024-11 · tds
  22. TECAMID 66 GF30 black (PA66-GF30) — stock shape properties Ensinger · 2026-08 · tds
  23. BambuLab PLA Basic vs PLA Tough vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  24. Polymaker PLA Pro vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  25. Carbon Fiber PLA vs META-PLA vs PLA+ vs PLA by Sunlu — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  26. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  27. PLA — material guide Prusa Knowledge Base · 2026-08 · doc
  28. 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
  29. Ultramid Nylon Chemical Resistance guide (unmodified PA6 B27E and PA66 A27E) BASF · 2026-08 · tds
  30. Solubility Study of Ingeo Biopolymer Grades in Common Organic Solvents (NWPD003) NatureWorks · 2019-10 · tds
  31. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  32. 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