3D Printing Info

Filament comparison

rPETG vs PLA Stone

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

Recycled PETG (rPETG) guideStone-filled PLA guide

2 selected · all documented properties

Open these two in the interactive comparisonMore rPETG comparisonsMore PLA Stone comparisons
rPETG vs PLA Stone — documented properties and sources
PropertyRecycled PETG (rPETG)PETGStone-filled PLAPLA
Market snapshot
Listing priceUSD/kg; dated snapshots$28.99/kg median; $17.24–$39.98/kg across 4 dated product listings$22.99/kg median; $15.99–$49.16/kg across 6 dated product listings
Identity & Market
Base polymer / chemistryPETG regranulated from recycled polyester waste; Polymaker's Fiberon PETG-rCF08 adds 8 wt% recycled carbon fibre[1][2][3]PLA filled with stone or mineral powder — Formfutura StoneFil declares 40–50 wt% stone powder[4][5]
Densityg/cm³1.27 (Prusament) and 1.30 (Fiberon PETG-rCF08), ISO 1183[1][3]1.22 (Bambu Lab PLA Marble) and 1.50–1.70 (Formfutura StoneFil), ISO 1183[5][4]
Typical priceUSD/kg1 kg spools cluster near 29[6][7][8][9]1 kg spools cluster near 21[10][8]
Price range across brandsUSD/kg17–40 across brands; Filament PM RePETG 17, 3DXTech ECOMAX 26, GreenGate3D 32, Fiberon rCF08 40[6][7][8][9]16–49 across brands; SUNLU 16, ELEGOO 19, Polymaker 21, Bambu Lab 25, Prusament 38, Filament PM MarbleJet 49 on 0.5 kg spools[11][8][10][12][13][14]
Market availability1–5Available from several mainstream brands[6][7][8]Stocked by most mainstream brands[10][8][11]
Spool sizes & diameters1.75 and 2.85 mm; 0.5, 1 and 3 kg spools[8][7]1.75 and 2.85 mm; 0.5 and 1 kg spools plus refills[8][4]
Typical applicationsNot documentedArchitectural models, sculpture and props with a matte mineral surface[5]
Diameter tolerance± mm±0.05 (Prusament PETG Recycled), against ±0.02 for virgin Prusament PETG[1][15]Not documented
Printing Parameters
Nozzle temperature°C250 ± 10 (Prusament); 230–255 (Spectrum)[1][2]190–230 (Bambu Lab)[5]
Bed temperature°C80 ± 10 (Prusament); 60–80 (Spectrum)[1][2]35–45 (Bambu Lab)[5]
Enclosure / chamber requirement1–5Open frame is fine — Spectrum states a closed chamber is not necessary[2]Open frame is fine[5]
Part cooling fan50 % (Prusament); up to 100 % (Spectrum)[1][2]Fan on[5]
Bed surface & adhesion aidTextured PEI, satin or powder-coated sheets; on smooth PEI a glue stick acts as a release agent[15][16]Not documented
Bed-adhesion difficulty1–5Needs the right surface or a thin adhesive — the problem is releasing the part, not sticking it[15][16]Not documented
Stringing / oozing tendency1–5Moderate — retraction tuning needed; Polymaker names stringing as PETG's common quirk[16]Not documented
Overall printing difficulty1–5Easy — minor profile tuning; Spectrum describes printing as similar to standard PETG[2]Easy — minor profile tuning; 0.2 mm nozzles are not usable[17]
Extruder requirementNot documentedNozzles below 0.4 mm are not compatible (Bambu Lab)[17]
Hardware Wear & Reliability
Nozzle hardness required1–4Brass fine indefinitely[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[17]
Abrasiveness1–5Not documentedModerately abrasive — stone fill[17][4]
Nozzle clog risk1–5Low — recycled PETG prints on the same hardware as virgin PETG: no special hot-end, no drybox and no hardened nozzle[18][19]Moderate — needs dry filament and a clean nozzle[17]
Heat-creep / jam sensitivity1–5Slightly sensitive[18]Not documented
Hotend requirementNo special hot-end required[18]Not documented
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Moderate (0.3–0.8 %) — recycled PETG shares the virgin matrix, which reaches 0.40 % saturated at 25 °C / 55 % RH[15]Moderate — 0.44 % saturated at 25 °C / 55 % RH[5]
Equilibrium moisture content at ~50 % RH%0.07 after 24 h and 0.10 after 7 days at 24 °C / 22 % RH (Prusa Polymers)[1]0.44 saturated at 25 °C / 55 % RH (Bambu Lab)[5]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[20]Not documented
Effect of moisture on strengthPolymaker groups PETG with nylon, PVA and TPU as highly hygroscopic; no dry-versus-conditioned strength figures are published for this grade and the loss shows as bubbling and poor layer adhesion[20]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[20]
Storage requirementSealed with desiccant; Polymaker groups PETG with the highly hygroscopic materials[20][16]Not documented
Mechanical Properties
Tensile strength (XY)MPa43 ± 1.8 printed horizontal at yield, ISO 527-1 (Prusament), against 47 ± 2 for virgin Prusament PETG; Spectrum quotes 52 at yield on moulded specimens[1][15][2]33 ± 4 printed XY, ISO 527 (Bambu Lab)[5]
Young's modulusMPa1500 printed horizontal, 1600 printed vertical (Prusament, ISO 527-1) — the same as virgin Prusament PETG[1][15]2330 ± 240 printed XY, ISO 527 (Bambu Lab)[5]
Elongation at break%4.5 at yield printed (Prusament); Spectrum quotes 400 at break on moulded specimens[1][2]6.7 ± 0.5 printed XY, ISO 527 (Bambu Lab)[5]
Flexural strengthMPa63 ± 1 printed horizontal, ISO 178 (Prusament), against 66 ± 2 for virgin Prusament PETG[1][15]75 ± 5 printed XY, ISO 178 (Bambu Lab)[5]
Flexural modulusMPa1800 printed horizontal, ISO 178 (Prusament)[1]2920 ± 180 printed XY, ISO 178 (Bambu Lab)[5]
Charpy impact, notchedkJ/m²12 ± 1 printed horizontal and 15 ± 3 printed vertical, ISO 179-1 notched (Prusament)[1]9.5 ± 2.6 printed XY, ISO 179, notched (Bambu Lab)[5]
Other impact dataCharpy unnotched 25 ± 3 printed horizontal and 38 ± 11 printed vertical (Prusament, ISO 179-1)[1]Charpy unnotched 24.0 printed XY (Bambu Lab, ISO 179)[5]
Layer adhesion / Z tensileMPa15 ± 5 (Prusa Polymers interlayer adhesion test), against 18 ± 4 for virgin Prusament PETG[1][15]30 ± 4 printed Z, ISO 527 (Bambu Lab)[5]
Brittleness1–5Moderate[1]Brittle — snaps with little warning[5]
Hardness (scale-specific)Shore A / Shore D / Rockwell74 Shore D (Prusa Polymers method) — the same as virgin Prusament PETG[1][15]Not documented
Creep resistance / sustained load1–5Below average — no recycled-grade creep test; virgin PETG sagged from 12 to 17.1–20.4 mm over 5 days at 1.25 kg[21][22][23][24]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[25][26][27]
Fatigue / repeated-flex resistance1–5Moderate — no recycled-grade S-N curve; virgin printed PETG ran 79 000–193 000 cycles at 30 % of tensile strength[28]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[28][5]
Elasticity / flexibility1–5Slightly flexible in thin sections[1]Rigid[5]
Z strength as % of XY%Not documented91 by tensile, 73 by flexural (printed, Bambu Lab)[5]
Thermal Properties
HDT at 0.45 MPa°C68 (ISO 75, 0.45 MPa) — the same as virgin Prusament PETG; Spectrum quotes 70[1][15][2]56 (ISO 75, 0.45 MPa)[5]
HDT at 1.8 MPa°C68 (ISO 75, 1.8 MPa)[1]53 (ISO 75, 1.8 MPa)[5]
Glass transition (Tg)°CNot documented56 (DSC)[5]
Melting point / Vicat°CNot documented156 peak melt (DSC); Formfutura gives a 120–170 melting range for StoneFil[5][4]
Flammability / UL 94Flammable; no UL 94 rating published for standard grades[29]Not documented
Environment & Chemical
UV resistance1–5Not documentedDegrades within weeks outdoors[30]
Chemical resistanceWithstands acids, alkalis, oils and UV exposure[16]Not documented
Food contactNot certified for food contact as filament[16]Not documented
Biodegradability / compostabilityNot biodegradable[16]Not documented
RecyclabilityThe feedstock itself — Spectrum describes collecting, shredding and re-homogenising PETG waste[2]Not documented
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[31]Low hazard — minimal VOC and particle emission[31]
Ventilation / filtration requirement1–5Open a window / occasional ventilation[31]None needed in a normal room[31]
Dust & fibre handling hazardNot documentedFormfutura'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 & machiningSands poorly — the material is tough and gums rather than powders[18]Sands to a stone-like matte surface[4]
Gluing & solvent weldingCyanoacrylate; no common solvent welds PETG cleanly[18]Not documented
Vapour / chemical smoothingNo practical vapour smoothing[18]Not documented
Support material pairingPrints its own supports; Polymaker rates PolyDissolve S1 for PETG[18]Support for PLA (Bambu Lab)[5]
Dimensional accuracy & detailNot documentedMatte mineral surface hides layer lines; 55° overhangs and 30 mm bridges as for plain PLA[5]
Solvents & Solubility
Soluble inNo common workshop solvent; 1,2-dichloroethane destroys it inside a week and dichloromethane — a carcinogen — dissolves the surface.[32][33]Chloroform dissolves the PLA matrix (10 % w/v, 2–4 h at 23 °C) and leaves the filler as loose sludge; laboratory reagent.[34]
Softened or crazed byAcetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[32]Acetone, ethyl acetate and toluene plasticise the matrix but dissolve <1 % even at 65 °C; acetone submersion crazes parts.[34][33]
Solvent welding & smoothing agentDichloromethane brushed on is the only agent that smooths PETG — a controlled carcinogen, not workshop stock.[33]Chloroform vapour attacks only the resin fraction, so the filler is left standing proud; no workshop-safe agent exists.[35][33]

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. Prusament PETG Recycled Technical Datasheet Prusa Polymers · 2026-08 · tds
  2. Spectrum r-PETG Technical Data Sheet Spectrum Filaments · 2026-08 · tds
  3. Fiberon PETG-rCF08 Technical Data Sheet V1.0 Polymaker · 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. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  7. GreenGate3D Recycled PET-G — product data GreenGate3D · 2026-08 · vendor
  8. Polymaker product catalogue Polymaker · 2026-08 · vendor
  9. Filament PM RePETG technical data sheet Filament PM (Plasty Mladec) · 2026-08 · tds
  10. PLA Marble — product page Bambu Lab US Store · 2026-08 · vendor
  11. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  12. Printed Solid product catalogue Printed Solid · 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. Prusament PETG Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  16. PETG — material basics Polymaker Wiki · 2026-08 · doc
  17. PLA Usage Guide Bambu Lab Wiki · 2026-08 · doc
  18. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  19. Filament Material Guide Prusa Knowledge Base · 2026-08 · doc
  20. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  21. PCTG vs PETG comparison — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  22. Extrudr PETG vs PCTG vs XPETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  23. Prusament PETG-CF vs PETG V0 vs PETG — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  24. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  25. BambuLab PLA Basic vs PLA Tough vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  26. Polymaker PLA Pro vs PLA-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  27. Carbon Fiber PLA vs META-PLA vs PLA+ vs PLA by Sunlu — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  28. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  29. Prusament PETG V0 Technical Datasheet Prusa Polymers · 2026-08 · tds
  30. PLA — material guide Prusa Knowledge Base · 2026-08 · doc
  31. 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
  32. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  33. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  34. Solubility Study of Ingeo Biopolymer Grades in Common Organic Solvents (NWPD003) NatureWorks · 2019-10 · tds
  35. 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