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ABS needs a warm chamber: enclosure, warping control and fume handling

Published October 15, 202622 sources

Short answer

ABS prints at 240–270 °C on an 80–110 °C bed, and its makers want it inside an enclosure: Bambu Lab lists a 45–60 °C chamber and Polymaker marks an enclosed chamber as needed [2, 5]. Without warm air around the part, ABS warps; Prusa puts its shrinkage at about 1–2% [1]. Print it in a well-ventilated room or with filtration, because it releases fumes during printing [1, 3].

Published ranges at a glance

The span of values that makers publish for 10 products (ABS) in the filament database, by grade. Every product, with its source, is listed in the full table below the guide.

GradeProductsNozzle °CBed °CDrying °CHDT at 0.45 MPa, °C
ABS8 from 8 brands210–29080–11065–8573–101
ABS-CF1 from 1 brand250–270100–11070–8099
ABS-GF1 from 1 brand250–270100–11065not published

ABS needs both a hot nozzle and a hot bed. The two published data sheets and the Prusa Knowledge Base agree on the range:

Setting Bambu ABS Polymaker PolyLite ABS Prusa Knowledge Base
Nozzle 240–270 °C 245–265 °C 255 °C
Bed 80–100 °C 90–100 °C 100 °C (80–110 °C by part size)
Part cooling 0–80% off not published
Chamber 45–60 °C enclosure needed enclosure
Retraction 0.8–1.4 mm 1–3 mm not published
Print speed below 300 mm/s 50–200 mm/s not published

Sources: [2, 5, 1].

Prusa ties the bed temperature to object size: larger objects need the higher end of 80–110 °C [1]. Bambu Lab’s plate table lists 90–100 °C on the Engineering, Smooth PEI and Textured PEI plates, with glue stick or liquid glue, and does not recommend the Cool Plate [7]. Prusa recommends a smooth or powder-coated PEI sheet with glue stick [1].

Why the enclosure matters

ABS shrinks as it cools, and the stress from that shrinkage lifts corners and edges off the bed [9]. Bambu Lab’s product page lists an enclosed printer as required for its ABS [3]. Prusa lists significant warping and the need for an enclosure among ABS’s main drawbacks, and recommends keeping a high ambient temperature around the print [1].

The printer and slicer documentation put different numbers on a warm chamber:

  • Bambu Lab’s data sheet lists a 45–60 °C chamber for ABS [2].
  • OrcaSlicer’s reference table lists a 50–70 °C chamber for ABS [10].
  • Polymaker’s wiki says to heat the bed to 90–100 °C for 10 minutes before printing so the chamber can warm up [6].
  • For its engineering filaments, Bambu Lab suggests preheating the bed at maximum temperature for 15 minutes on the X1C and P1S when the room is cold [9].

In OrcaSlicer, Print chamber temperature (chamber_temperature) sends M191 before the start G-code on printers with an active chamber heater; the same value can be passed to a heat-soak macro if the printer has no heater [10].

Two cautions come with the heat. Prusa warns that long ABS prints inside an enclosure can deform the fan shroud and other printed plastic parts of the printer itself [1]. Prusa also asks for room ventilation that does not create a draft around the print, because a draft hurts the result [1].

Without an enclosure, Prusa’s fallback is PrusaSlicer’s Draft shield (under Skirt and brim), a printed wall that keeps the model slightly warmer [1]. Bambu Lab does not recommend ABS on its open-frame printers [7].

Warping and shrinkage in the slicer

Bambu Lab’s slicing guide lists the factors that raise warping risk: large size, high infill density, and a large flat area in contact with the bed. It suggests splitting large models, tilting them about 45°, using lower infill, a relatively high bed temperature, and closing the door and top cover to raise the chamber temperature [8]. Bambu Lab presents the tilt as a middle ground: flat parts are strongest but warp most, while upright parts warp least but load the weaker layer bonds [8].

Prusa puts ABS shrinkage at around 1–2% and recommends printing a test object and comparing it with the model [1]. The shrinkage calculator turns that measurement into a scale factor. For a full list of warping fixes, see the warping guide.

Cooling is the other lever. Polymaker’s data sheet says fan off, and its wiki says hotter, slower printing gives better layer adhesion at the cost of uglier overhangs [5, 6]. Bambu’s data sheet allows 0–80% [2].

Fumes, ventilation and filtration

Safety: Prusa’s Knowledge Base says ABS releases fumes and substances that could pose a potential health risk, names styrene among its drawbacks, and says to print in a well-ventilated room [1]. Bambu Lab’s ABS product page says the filament may release harmful gases, including styrene, at printing temperatures; it recommends an enclosed printer, a well-ventilated area or an air filtration or exhaust system, and more ventilation or a pause when people with respiratory conditions, pregnant women or children are present [3]. For extended operation, the same page suggests a mask with a vapor filter such as activated carbon [3].

The safety data sheet is less specific than the product page. Bambu Lab’s ABS SDS classifies the filament as not hazardous under EU regulation (EC) No 1272/2008, lists “no available data” for hazardous decomposition products, and advises moving to fresh air if respiratory irritation occurs [4]. Its accidental-release section says to avoid inhaling aerosol or gas and to ensure adequate ventilation, while its exposure section says respiratory protection is not necessary under normal conditions [4]. The SDS contains no emission measurements from printing, so it does not settle the question; the product page’s advice is the more cautious of the two Bambu Lab documents.

For enclosed printers with filters, Prusa describes what its Advanced Filtration System combines: a HEPA filter for ultrafine particles and an activated carbon filter for chemical vapors. Prusa calls it particularly important for ASA, ABS and nylon, which release more microparticles and odor during melting [11]. OrcaSlicer adds a trade-off: a higher chamber temperature reduces warping but also reduces air filtration efficiency for ABS and ASA [10].

Heat resistance and post-processing

ABS has a much higher heat deflection temperature than PLA. Bambu ABS lists heat deflection of 87 °C at 0.45 MPa and 84 °C at 1.80 MPa; PolyLite ABS lists 100 °C and 98 °C [2, 5]. The heat resistance comparison puts these next to other materials.

Prusa notes that ABS can be sanded wet or dry and smoothed with acetone vapor, and that outdoor ABS parts turn yellowish and more brittle over time [1]. Bambu Lab classes ABS as amorphous: annealing can relieve some thermal stress and improve strength and heat resistance, but parts may deform, especially large or thin ones [12]. Its ABS data sheet suggests 80–90 °C for 6–12 hours in a forced-air oven [2].

For outdoor parts, compare ABS with its more UV-resistant relative in ABS vs ASA.

All 10 products in the database

Values as each manufacturer publishes them (ABS). Filter by grade or brand, or click a column heading to sort; "not published" sorts last.
Source
Bambu LabABSABS240–27080–1001.0580 °C, 8 h87 °C @ 0.45 MPa
84 °C @ 1.8 MPa		not published[2]
ElegooABSABS240–28090–1001.0565–75 °C, 8 h85 °C @ 0.45 MPanot published[13]
eSUNABS+ABS230–27095–1101.06not published73 °C @ 0.45 MPanot published[14]
HatchboxABSABS210–240not publishednot publishednot publishednot publishednot published[15]
OvertureABSABS245–26580–1001.1575 °C, 7 h98 °Cnot published[16, 17]
PolymakerPolyLite ABSABS245–26590–1001.0470 °C, 6 h100 °C @ 0.45 MPa
98 °C @ 1.8 MPa		not published[5]
Siraya TechFibreheart ABS-CFABS-CF250–270100–1101.0670–80 °C, 4–6 h99 °C @ 0.45 MPa
94 °C @ 1.8 MPa		not published[18]
Siraya TechFibreheart ABS-GFABS-GF250–270100–1101.0865 °C, 4–6 h93 °C
97 °C		not published[19]
Siraya TechFibreheart ABS HT HFABS240–260100–1101.0570–80 °C, 4–6 h101 °C @ 0.45 MPa
99 °C @ 1.8 MPa		not published[20]
SunluABSABS250–29080–1001.0275–85 °C, 6–8 h95 °C @ 0.45 MPanot published[21, 22]

Questions

Can ABS be printed on an open-frame printer?

Bambu Lab does not recommend ABS on its open-frame printers and recommends an enclosed one [7]. For small parts without an enclosure, Prusa suggests PrusaSlicer's draft shield, a printed wall that keeps the model slightly warmer [1].

Does ABS need to be dried?

Bambu Lab lists drying as recommended, at 80 °C for 8 hours in a blast drying oven, and storage below 20% relative humidity [2, 7]. Polymaker gives 70 °C for 6 hours for PolyLite ABS [5].

Sources

  1. ABS. Prusa Knowledge Base. Manufacturer documentation. Temperatures, enclosure, draft shield, shrinkage 1–2%, fumes and ventilation without drafts. Accessed October 12, 2026.
  2. Bambu ABS Technical Data Sheet (V3.0). Bambu Lab. Technical data sheet. Nozzle, bed, chamber 45–60 °C, fan 0–80%, HDT, annealing range. Accessed October 12, 2026.
  3. ABS product page. Bambu Lab. Product page. Enclosure required, styrene and ventilation safety tips, warping prevention tips. Accessed October 12, 2026.
  4. Bambu ABS Material Safety Data Sheet (report EGZ2303300052C01001R, 2023-04-07). Bambu Lab. Safety data sheet. CLP classification, first aid for inhalation, ventilation advice, decomposition data. Accessed October 12, 2026.
  5. PolyLite ABS Technical Data Sheet (V5.5). Polymaker. Technical data sheet. Nozzle 245–265 °C, bed 90–100 °C, fan off, enclosure needed, HDT. Accessed October 12, 2026.
  6. Polymaker Material Print Tips. Polymaker Wiki. Manufacturer documentation. Bed preheat for 10 minutes, hot-and-slow trade-off, fan off for adhesion problems. Accessed October 12, 2026.
  7. Filament guide: printer, nozzle, AMS, build plate, glue compatibility and required parameters. Bambu Lab Wiki. Manufacturer documentation. Enclosed printer recommendation, plate temperatures with glue, AMS lite note. Accessed October 12, 2026.
  8. Parameters selection and setting during slicing. Bambu Lab Wiki. Manufacturer documentation. Warping causes and fixes: part size, orientation, infill, closed door and top cover. Accessed October 12, 2026.
  9. PET-CF / PPA-CF / PPS-CF / PA6 CF Carbon Fibers Filament Usage Guide. Bambu Lab Wiki. Manufacturer documentation. Shrinkage-driven warping of high-temperature filaments; bed preheat for 15 minutes on X1C and P1S. Accessed October 12, 2026.
  10. Material Temperatures. OrcaSlicer Wiki. Slicer documentation. Chamber temperature table for ABS; effect of chamber heat on filtration. Accessed October 12, 2026.
  11. Advanced Filtration System (glossary). Prusa Knowledge Base. Manufacturer documentation. HEPA plus activated carbon; ABS, ASA and nylon release more particles and odor. Accessed October 12, 2026.
  12. Post-printing procedures (removing, cleaning, annealing, bonding). Bambu Lab Wiki. Manufacturer documentation. ABS is amorphous; annealing benefits and warping risk. Accessed October 12, 2026.
  13. ELEGOO ABS product page: Specifications. ELEGOO. Product page. Specifications section: drying, recommended printing settings, physical properties (density, Vicat, HDT at 0.45 MPa) and X-Y/Z mechanical properties; no test standards named. Accessed October 12, 2026.
  14. Product Comparison. eSUN (official store). Product page. Values appear after choosing a product in the comparison tool: density, HDT at 0.45 MPa, melt flow index, Z tensile strength, X-Y flexural and Izod values, extruder and bed temperature, fan, print speed, build surfaces and printing recommendations; no test standards named. Accessed October 12, 2026.
  15. Black ABS Filament - 1.75mm, 1kg Spool. HATCHBOX. Product page. Print temperature 210–240 °C. Page text read via the store's public /products/<handle>.js endpoint; the HTML page returns 403 to automated requests. Accessed October 12, 2026.
  16. OVERTURE ABS Technical Data Sheet (Version 5.1, August 2024). Overture 3D. Technical data sheet. Recommended printing conditions, physical and mechanical properties of 3D-printed specimens (100% infill). Accessed October 12, 2026.
  17. Overture ABS 3D Printer Filament 1.75mm (product page). Overture 3D. Product page. Specs tab drying setting; description states heat deflection up to 98 °C and different nozzle/bed settings. Accessed October 12, 2026.
  18. Siraya Tech Fibreheart ABS-CF TDS. Siraya Tech. Technical data sheet. Print settings, chamber temperature, drying, property data. Accessed October 12, 2026.
  19. Fibreheart ABS-GF Filament TDS. Siraya Tech. Technical data sheet. Print settings, drying, property data. Accessed October 12, 2026.
  20. Fibreheart ABS HT HF Filament TDS. Siraya Tech. Technical data sheet. Print settings, chamber temperature, drying, property data. Accessed October 12, 2026.
  21. SUNLU ABS Technical Data Sheet (SL-TE-WI-068, version A/1). SUNLU. Technical data sheet. Recommended printing parameters with drying temperature; ISO 75 HDT at 0.45 MPa, ISO 306 Vicat, ISO 1183 density and ISO 527-2 X-Y tensile results from printed specimens. Accessed October 12, 2026.
  22. Material Performance Comparison. SUNLU Wiki. Manufacturer documentation. Detailed specification table for the SUNLU line, including drying temperature and drying time per product. Accessed October 12, 2026.