3D Printing Info

Filament comparison

PLA Stone vs POM

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

Stone-filled PLA guidePOM (acetal) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PLA Stone comparisonsMore POM comparisons
PLA Stone vs POM — documented properties and sources
PropertyStone-filled PLAPLAPOM (acetal)ENGINEERING
Market snapshot
Listing priceUSD/kg; dated snapshots$22.99/kg median; $15.99–$49.16/kg across 6 dated product listingsNot documented
Identity & Market
Base polymer / chemistryPLA filled with stone or mineral powder — Formfutura StoneFil declares 40–50 wt% stone powder[1][2]Polyoxymethylene, normally the copolymer POM-C. Apium's filament grade is POM-C with antistatic additives; no unfilled POM filament was found on sale[3][4]
Densityg/cm³1.22 (Bambu Lab PLA Marble) and 1.50–1.70 (Formfutura StoneFil), ISO 1183[2][1]1.41 (extruded POM-C stock)[3]
Typical priceUSD/kg1 kg spools cluster near 21[5][6]Not documented
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[7][6][5][8][9][10]Not documented
Market availability1–5Stocked by most mainstream brands[5][6][7]Special order, 1-2 makers worldwide — Apium sells a POM-C ESD filament through its own shop and states its printers are the only ones able to process POM-C; no POM filament appears in the 3DJAKE or igo3d product sitemaps, at MatterHackers or at Printed Solid[4][11][12][8]
Spool sizes & diameters1.75 and 2.85 mm; 0.5 and 1 kg spools plus refills[6][1]Not documented
Typical applicationsArchitectural models, sculpture and props with a matte mineral surface[2]Gears, bushings, bearings, conveyor and food-machinery parts; Apium markets its POM-C ESD grade for semiconductor insulators, aerospace fasteners and sliding parts[3][4]
Printing Parameters
Nozzle temperature°C190–230 (Bambu Lab)[2]Not documented
Bed temperature°C35–45 (Bambu Lab)[2]Not documented
Enclosure / chamber requirement1–5Open frame is fine[2]Not documented
Part cooling fanFan on[2]Not documented
Overall printing difficulty1–5Easy — minor profile tuning; 0.2 mm nozzles are not usable[13]Not documented
Extruder requirementNozzles below 0.4 mm are not compatible (Bambu Lab)[13]Apium states that the adaptive heating system on its industrial machines is what makes POM-C printable, and that no other 3D printer can process it[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[13]Not documented
Abrasiveness1–5Moderately abrasive — stone fill[13][1]Not documented
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle[13]Not documented
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Moderate — 0.44 % saturated at 25 °C / 55 % RH[2]Low (0.1-0.3 %) — extruded POM-C stock takes up 0.18 % in 24 h and 0.80 % at saturation (ASTM D570)[3]
Equilibrium moisture content at ~50 % RH%0.44 saturated at 25 °C / 55 % RH (Bambu Lab)[2]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[14]Not documented
Mechanical Properties
Tensile strength (XY)MPa33 ± 4 printed XY, ISO 527 (Bambu Lab)[2]66.9 at break and 64.1 at yield (extruded POM-C stock, ASTM D638; converted from 9700 and 9300 psi)[3]
Young's modulusMPa2330 ± 240 printed XY, ISO 527 (Bambu Lab)[2]2275 (extruded POM-C stock, ASTM D638; converted from 330,000 psi)[3]
Elongation at break%6.7 ± 0.5 printed XY, ISO 527 (Bambu Lab)[2]40 at break and 9 at yield (extruded POM-C stock, ASTM D638)[3]
Flexural strengthMPa75 ± 5 printed XY, ISO 178 (Bambu Lab)[2]89.6 (extruded POM-C stock, ASTM D790; converted from 13,000 psi)[3]
Flexural modulusMPa2920 ± 180 printed XY, ISO 178 (Bambu Lab)[2]2758 (extruded POM-C stock, ASTM D790; converted from 400,000 psi)[3]
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]Izod 53 J/m on extruded POM-C stock, converted from 1.0 ft-lb/in[3]
Layer adhesion / Z tensileMPa30 ± 4 printed Z, ISO 527 (Bambu Lab)[2]Not documented
Brittleness1–5Brittle — snaps with little warning[2]Tough — absorbs impact, yields before breaking; extruded stock elongates 40 % before failing. No printed figure is published[3]
Hardness (scale-specific)Shore A / Shore D / RockwellNot documentedRockwell 86 (and R120) — the source names only the R scale on extruded POM-C stock (ASTM D785)[3]
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[15][16][17]Not documented
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[18][2]Not documented
Elasticity / flexibility1–5Rigid[2]Not documented
Z strength as % of XY%91 by tensile, 73 by flexural (printed, Bambu Lab)[2]Not documented
Wear resistance & frictionNot documentedWear factor 65e-10 in3*min/(ft*lb*h) and a dynamic coefficient of friction of 0.21 at 40 psi and 50 fpm (ASTM D3702, extruded stock) — the properties that make acetal the default gear and bushing plastic; Apium lists good sliding properties as the reason for its grade[3][4]
Thermal Properties
HDT at 0.45 MPa°C56 (ISO 75, 0.45 MPa)[2]158 (extruded POM-C stock, ASTM D648 at 66 psi; converted from 316 °F)[3]
HDT at 1.8 MPa°C53 (ISO 75, 1.8 MPa)[2]110 (extruded POM-C stock, ASTM D648 at 264 psi; converted from 230 °F)[3]
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]165 melting (extruded POM-C stock; converted from 329 °F)[3]
Continuous service temperature°CNot documented91 long term and 141 intermittent (extruded POM-C stock; converted from 195 °F and 285 °F)[3]
Thermal expansion (CTE)µm/m·KNot documented84.6 (extruded POM-C stock, ASTM D696; source states 4.7e-5 in/in/°F)[3]
Flammability / UL 94Not documentedUL 94 HB on extruded POM-C stock[3]
Environment & Chemical
UV resistance1–5Degrades within weeks outdoors[19]Not documented
Chemical resistanceNot documentedGood chemical resistance, particularly to bases; Apium lists resistance to bases as a headline property[3][4]
Water / humidity resistance in service1–5Not documentedGood — minor absorption; 0.80 % water at saturation (ASTM D570, extruded stock)[3]
Electrical & ESD propertiesNot documentedVolume resistance 1e14 ohm-cm, dielectric strength 500 V/mil and dielectric constant 3.7 at 60 Hz on extruded stock (ASTM D257, D149, D150); Apium's filament grade adds antistatic agents[3][4]
Health & Safety
Fume toxicity1–5Low hazard — minimal VOC and particle emission[20]Not documented
Ventilation / filtration requirement1–5None needed in a normal room[20]Not documented
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]Easy to machine — Ensinger lists machinability as a headline property of POM-C stock[3]
Support material pairingSupport for PLA (Bambu Lab)[2]Not documented
Dimensional accuracy & detailMatte mineral surface hides layer lines; 55° overhangs and 30 mm bridges as for plain PLA[2]Not documented
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.[21]Hexafluoroisopropanol dissolves it at room temperature; NMP and DMF only when hot. Laboratory reagents.[22]
Softened or crazed byAcetone, ethyl acetate and toluene plasticise the matrix but dissolve <1 % even at 65 °C; acetone submersion crazes parts.[21][23]Acids, oxidants, halogens and hot concentrated zinc chloride attack it; alcohols, ketones and esters do not.[22][24]
Solvent welding & smoothing agentChloroform vapour attacks only the resin fraction, so the filler is left standing proud; no workshop-safe agent exists.[25][23]None — no solvent softens POM below its melting point, which is why it is bolted or heat-welded rather than glued.[22]

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. TECAFORM AH natural (POM-C) — stock shape properties Ensinger · 2026-08 · tds
  4. POM-C ESD 3D printing — material page Apium 3D Technologies · 2026-08 · doc
  5. PLA Marble — product page Bambu Lab US Store · 2026-08 · vendor
  6. Polymaker product catalogue Polymaker · 2026-08 · vendor
  7. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  8. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  9. SUNLU High Speed PLA Marble 3D Printer Filament 1 kg SUNLU · 2026-08 · vendor
  10. Filament PM PLA MarbleJet technical data sheet Filament PM (Plasty Mladec) · 2026-08 · tds
  11. 3DJAKE product catalogue 3DJAKE · 2026-08 · vendor
  12. igo3d product sitemap (17452 product URLs) igo3d · 2026-08 · vendor
  13. PLA Usage Guide Bambu Lab Wiki · 2026-08 · doc
  14. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  15. BambuLab PLA Basic vs PLA Tough vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  16. Polymaker PLA Pro vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  17. Carbon Fiber PLA vs META-PLA vs PLA+ vs PLA by Sunlu — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  18. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  19. PLA — material guide Prusa Knowledge Base · 2026-08 · doc
  20. 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
  21. Solubility Study of Ingeo Biopolymer Grades in Common Organic Solvents (NWPD003) NatureWorks · 2019-10 · tds
  22. Resistance of Ultramid, Ultraform and Ultradur to chemicals (TI-KTU/AS-28 e) BASF · 2000-10 · tds
  23. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  24. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  25. 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