3D Printing Info

Filament comparison

PLA Stone vs TPU 95A

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

Stone-filled PLA guideTPU 95A guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PLA Stone comparisonsMore TPU 95A comparisons
PLA Stone vs TPU 95A — documented properties and sources
PropertyStone-filled PLAPLATPU 95AFLEX
Market snapshot
Listing priceUSD/kg; dated snapshots$22.99/kg median; $15.99–$49.16/kg across 6 dated product listings$39.99/kg median; $23.00–$106.05/kg across 15 dated product listings
Identity & Market
Base polymer / chemistryPLA filled with stone or mineral powder — Formfutura StoneFil declares 40–50 wt% stone powder[1][2]Thermoplastic polyurethane, polyester or polyether based, at about 92–95 Shore A[3][4]
Densityg/cm³1.22 (Bambu Lab PLA Marble) and 1.50–1.70 (Formfutura StoneFil), ISO 1183[2][1]1.20–1.25 (ISO 1183); Prusament 1.25, Polymaker 1.20–1.24, Bambu Lab 1.22[3][4][5]
Typical priceUSD/kg1 kg spools cluster near 21[6][7]1 kg spools cluster near 35; the specialist and industrial brands run to 106[7][8][5][9][10][11]
Price range across brandsUSD/kg16–49 across brands; SUNLU 16, ELEGOO 19, Polymaker 21, Bambu Lab 25, Prusament 38, Filament PM MarbleJet 49 on 0.5 kg spools[12][7][6][8][13][14]23–106 across brands; IEMAI 3D 23, LANDU 24, Siraya Tech 25, PS Imports 25, PrimaCreator 32, Bambu Lab 35–42, Polymaker 40–50, add:north 72, Recreus 90, 3DXTech 96, NinjaTek Cheetah 106[8][15][7][16][9][10][17][18][19][11]
Market availability1–5Stocked by most mainstream brands[6][7][12]Ubiquitous, every brand and retailer[7][16][8][15][9][10]
Spool sizes & diameters1.75 and 2.85 mm; 0.5 and 1 kg spools plus refills[7][1]1.75 and 2.85 mm; 0.5, 0.75 and 1 kg spools[7][16]
Typical applicationsArchitectural models, sculpture and props with a matte mineral surface[2]Gaskets, phone cases, tyres, vibration mounts and protective covers[20]
Diameter tolerance± mmNot documented±0.06 (Prusament) — the loosest tolerance Prusa publishes, because soft filament deforms in the gauge[4]
Printing Parameters
Nozzle temperature°C190–230 (Bambu Lab)[2]210–240; Polymaker 210–230, Prusament 230 ± 10, Bambu Lab HF 220–240[3][4][5]
Bed temperature°C35–45 (Bambu Lab)[2]25–65; Prusament 65 ± 10, Bambu Lab 30–35, Polymaker 25–60[4][5][3]
Enclosure / chamber requirement1–5Open frame is fine[2]Open frame is fine[3]
Part cooling fanFan on[2]Fan on[3][5]
Bed surface & adhesion aidNot documentedPEI sheet or painter's tape; Polymaker warns TPU can over-stick and advises a glue stick as a release agent[21][20]
Maximum volumetric flow (mm³/s; see test conditions)mm³/sNot documented2.4 at Polymaker's 30–50 mm/s and 2.4 at Prusa's 30 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer; Bambu Lab's high-flow grade lifts the cap to 200 mm/s (16 mm³/s)[3][4][5]
Warping tendency1–5Not documentedNone[3]
Bed-adhesion difficulty1–5Not documentedSticks to most surfaces[3]
Stringing / oozing tendency1–5Not documentedModerate — retraction tuning needed; Polymaker specifies 3–6 mm retraction, well above the 1–3 mm used for rigid filaments[3]
Overall printing difficulty1–5Easy — minor profile tuning; 0.2 mm nozzles are not usable[22]Intermediate — dry filament and a tuned profile; the speed ceiling is the main constraint[3][4]
Extruder requirementNozzles below 0.4 mm are not compatible (Bambu Lab)[22]Direct drive strongly preferred. BASF rates its 95A grade as running on both direct-drive and Bowden machines, but every maker caps speed at 15–50 mm/s unless the grade is specifically high-flow[23][3][4]
Hardware Wear & Reliability
Nozzle hardness required1–4Brass 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[22]Brass fine indefinitely[24]
Abrasiveness1–5Moderately abrasive — stone fill[22][1]Non-abrasive[24]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle[22]Moderate — needs dry filament and a clean nozzle[25]
Heat-creep / jam sensitivity1–5Not documentedHigh — all-metal hotend and strong cooling needed; soft filament buckles in the cold zone if it slows[20]
Hotend requirementNot documentedNo special hot-end required, but a direct-drive extruder is (Simplify3D)[21]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Moderate — 0.44 % saturated at 25 °C / 55 % RH[2]Low (0.1–0.3 %) by Prusa's measurement at 0.04 % in 7 days, but Polymaker measures 0.82 % equilibrium and groups TPU with the highly hygroscopic materials[4][3][25]
Equilibrium moisture content at ~50 % RH%0.44 saturated at 25 °C / 55 % RH (Bambu Lab)[2]0.82 equilibrium (Polymaker); 0.02 after 24 h and 0.04 after 7 days at 22 % RH (Prusa)[3][4]
Drying temperature & timeNot documented70 °C for 8 h (Polymaker); 70 °C for 8 h or an 80–90 °C heatbed for 12 h (Bambu Lab)[3][5]
Symptoms when wetNot documentedBubbling and popping at the nozzle, stringing, rough surface and weak layers[25]
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[25]Polymaker groups TPU with nylon, PVA and PETG as highly hygroscopic and says these often need to stay in a dryer while printing; no dry-versus-conditioned figures are published[25]
Storage requirementNot documentedSealed with desiccant; often kept in a dryer during the print[25]
Mechanical Properties
Tensile strength (XY)MPa33 ± 4 printed XY, ISO 527 (Bambu Lab)[2]41.4 ± 1.3 printed (Prusament, ISO 37); NinjaTek Cheetah 39 ultimate (ASTM D638)[4][26]
Young's modulusMPa2330 ± 240 printed XY, ISO 527 (Bambu Lab)[2]Not documented
Elongation at break%6.7 ± 0.5 printed XY, ISO 527 (Bambu Lab)[2]551 ± 24 printed (Polymaker, ISO 37); the filament itself stretches 7264 % before break (Prusa, ISO 527)[3][4]
Flexural strengthMPa75 ± 5 printed XY, ISO 178 (Bambu Lab)[2]Not documented
Flexural modulusMPa2920 ± 180 printed XY, ISO 178 (Bambu Lab)[2]Not documented
Charpy impact, notchedkJ/m²9.5 ± 2.6 printed XY, ISO 179, notched (Bambu Lab)[2]Not documented
Other impact dataCharpy unnotched 24.0 printed XY (Bambu Lab, ISO 179)[2]Not documented
Layer adhesion / Z tensileMPa30 ± 4 printed Z, ISO 527 (Bambu Lab)[2]9.5 ± 0.2 (Prusament interlayer adhesion, ISO 527)[4]
Brittleness1–5Brittle — snaps with little warning[2]Very ductile — bends far before failing[3][4]
Hardness (scale-specific)Shore A / Shore D / RockwellNot documented92 ± 0.4 Shore A and 39 ± 0.7 Shore D (Prusament); 95A (Polymaker, ISO 7619-1); 91 Shore A / 40 Shore D (Fiberlogy FiberFlex 40D, ISO 7619); 95A (NinjaTek Cheetah, ASTM D2240); 94.5 A measured on a printed Bambu Lab 95A part and 96.2 A on a Qidi one (My Tech Fun)[4][3][27][26][28]
Creep resistance / sustained load1–5Poor — no stone-filled creep test; plain printed PLA sagged from 12 to 16.2–21.8 mm over 5 days at 1.25 kg[29][30][31]Poor — deforms under load at room temperature; a loaded bar crept from 74.5 to 82.7 mm over 5 days[28]
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 the mineral filler leaves a brittle compound[32][2]Excellent — living hinges viable[20]
Elasticity / flexibility1–5Rigid[2]Rubbery / highly elastic[3][4]
Z strength as % of XY%91 by tensile, 73 by flexural (printed, Bambu Lab)[2]Not documented
Wear resistance & frictionNot documentedAbrasion resistance is a headline property; BASF measures 64 mm³ loss by ISO 4649 on its 92A grade[23]
Thermal Properties
HDT at 0.45 MPa°C56 (ISO 75, 0.45 MPa)[2]Not documented
HDT at 1.8 MPa°C53 (ISO 75, 1.8 MPa)[2]Not documented
Glass transition (Tg)°C56 (DSC)[2]Not documented
Melting point / Vicat°C156 peak melt (DSC); Formfutura gives a 120–170 melting range for StoneFil[2][1]144 melting (BASF 95A, ISO 11357-3); Bambu Lab 183, Polymaker's modulus at 100 % elongation 8.9 MPa[23][5]
Continuous service temperature°CNot documentedBounded by a melting point of 144–183 °C; no loaded-bar service figure is published for TPU[23][5]
Flammability / UL 94Not documentedFlammable; no UL 94 rating published for the grades surveyed[3]
Environment & Chemical
UV resistance1–5Degrades within weeks outdoors[33]Good — years with some colour shift; Polymaker lists UV exposure among the conditions TPU withstands[20]
Chemical resistanceNot documentedGood resistance to oils and common solvents (BASF)[23]
Food contactNot documentedNot food safe without specific certification (Polymaker)[20]
Biodegradability / compostabilityNot documentedNot biodegradable[20]
RecyclabilityNot documentedNot accepted in household plastic collection[20]
Health & Safety
Fume toxicity1–5Low hazard — minimal VOC and particle emission[34]Low hazard — minimal VOC and particle emission; TPU was not among the nine filaments in the chamber study[34]
Ventilation / filtration requirement1–5None needed in a normal room[34]Open a window / occasional ventilation[34]
Dust & fibre handling hazardFormfutura'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[1]Not documented
Post-Processing
Sanding & machiningSands to a stone-like matte surface[1]Sanding is impractical — the surface tears rather than abrades[20]
Gluing & solvent weldingNot documentedCyanoacrylate bonds TPU; no common solvent welds it[20]
Vapour / chemical smoothingNot documentedNo practical vapour smoothing[20]
Support material pairingSupport for PLA (Bambu Lab)[2]Polymaker warns TPU supports are often very difficult to remove; PolyDissolve S1 is rated for TPU[20]
Dimensional accuracy & detailMatte mineral surface hides layer lines; 55° overhangs and 30 mm bridges as for plain PLA[2]Stringing and elephant-foot are the accuracy limits; retraction has to be long and slow[3]
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.[35]DMF, DMSO, NMP and THF dissolve TPU; acetone, MEK and cyclohexanone are partial solvents. All laboratory reagents.[36]
Softened or crazed byAcetone, ethyl acetate and toluene plasticise the matrix but dissolve <1 % even at 65 °C; acetone submersion crazes parts.[35][37]Toluene and benzene swell it up to +50 % by weight at 23 °C; esters swell it severely; ethanol and IPA soften it.[36]
Solvent welding & smoothing agentChloroform vapour attacks only the resin fraction, so the filler is left standing proud; no workshop-safe agent exists.[38][37]None practical — the true solvents (DMF, THF, NMP) are laboratory reagents and leave the joint swollen and weak.[36]

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. StoneFil safety data sheet Formfutura · 2026-08 · msds
  2. Bambu Filament Technical Data Sheet — PLA Marble Bambu Lab · 2026-08 · tds
  3. PolyFlex TPU95 Technical Data Sheet V5.4 Polymaker · 2024-11 · tds
  4. Prusament TPU 95A Technical Datasheet v1.0 Prusa Polymers · 2025-05 · tds
  5. Bambu Filament Technical Data Sheet — TPU 95A HF Bambu Lab · 2026-08 · tds
  6. PLA Marble — product page Bambu Lab US Store · 2026-08 · vendor
  7. Polymaker product catalogue Polymaker · 2026-08 · vendor
  8. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  9. LANDU TPU 3D Printer Filament 1.75 mm 95A Black 1 kg — Amazon listing Amazon.com · 2026-08 · vendor
  10. IEMAI 3D TPU 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  11. Cheetah product page — print guidelines, spool sizes and price NinjaTek · 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. TPU for AMS — product page Bambu Lab US Store · 2026-08 · vendor
  16. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  17. Siraya Tech Flex TPU 95A Filament — product page Siraya Tech · 2026-08 · vendor
  18. PrimaCreator EasyPrint FLEX TPU 95A product page PrimaCreator · 2026-08 · vendor
  19. add:north TPU Pro Matte 95A product page add:north · 2026-08 · vendor
  20. TPU — material basics Polymaker Wiki · 2026-08 · doc
  21. Flexible (TPE/TPU) — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  22. PLA Usage Guide Bambu Lab Wiki · 2026-08 · doc
  23. Ultrafuse TPU 95A Technical Data Sheet (Version 2.0) BASF Forward AM · 2022-08 · tds
  24. Extrudr Product Catalogue (DURAPRO PA12 data block) Extrudr · 2025-03 · tds
  25. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  26. NinjaTek technical specs comparison chart (Cheetah, NinjaFlex, Armadillo, Alloy 910, Nylon 645) NinjaTek · 2026-08 · tds
  27. FiberFlex 40D Technical Data Sheet Fiberlogy · 2026-08 · tds
  28. BambuLab TPU 95A HF vs Qidi TPU 95A HF — results spreadsheet My Tech Fun (Igor Gaspar) · 2024-02 · test
  29. BambuLab PLA Basic vs PLA Tough vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  30. Polymaker PLA Pro vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  31. Carbon Fiber PLA vs META-PLA vs PLA+ vs PLA by Sunlu — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  32. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  33. PLA — material guide Prusa Knowledge Base · 2026-08 · doc
  34. 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
  35. Solubility Study of Ingeo Biopolymer Grades in Common Organic Solvents (NWPD003) NatureWorks · 2019-10 · tds
  36. Elastollan — Chemical properties: swelling and chemical resistance BASF · 2026-08 · tds
  37. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  38. 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