Filament Guide
ABS Filament Guide
The original engineering plastic. Powerful but demanding.
Last updated: July 2026
TL;DR
- Needs an enclosure at 230-250°C nozzle, 100°C+ bed, warps aggressively in open air
- Acetone smoothable to a near-injection-mould finish, the main reason to pick ABS over ASA
- Handles 100°C+ heat, proven industrial material (LEGO bricks, car interiors)
- Emits styrene fumes, so print with ventilation or a carbon filter, not in bedrooms
ABS
Acrylonitrile Butadiene Styrene
The original engineering plastic. Powerful but demanding.
Intermediate
Declining Use
ABS is the plastic in LEGO bricks and automotive interiors. It's strong, heat-resistant, and acetone-smoothable, so you can vapor-smooth prints to a near-injection-mould finish. But it warps badly without an enclosure, emits styrene fumes, and ASA now does the same job without the UV degradation.
Use ABS when you need acetone smoothing or you're replacing an existing ABS part. For new designs, pick ASA, which is the better version.
Chemistry
Terpolymer: acrylonitrile (rigidity), butadiene (toughness), styrene (surface finish)
Print Temp
Heat Resistance
Softens at ~100°C[2] - good for under-bonnet and dashboard use
Post-Processing
Acetone smoothing produces near-injection-molded surface finish
Fumes
Emits styrene[1] - print in ventilated space or with HEPA+activated carbon filtration
UV Resistance
Poor - yellows and becomes brittle outdoors. Use ASA instead.
Pros
- High heat resistance (~100°C)
- Acetone smoothing for near-perfect surfaces
- Good impact resistance and toughness
- Machinable - drills, taps, sands well
- Lightweight for its strength
- Widely available, low cost
Cons
- Warps severely - enclosure nearly mandatory
- Styrene fumes - ventilation or filtration needed
- Layer splitting / delamination if cooled too fast
- UV unstable - yellows and degrades outdoors
- Requires heated bed (100-110°C)
- Largely superseded by ASA for new designs
Best Used For
Replacement automotive parts
Acetone-smoothed figurines
High-temp enclosures
Vacuum-forming bucks
Interior fixtures
Legacy part replication
Niche Tips
ABS juice
dissolve ABS scraps in acetone (~1:10 ratio) and apply a thin layer to your build plate. Works as a highly effective adhesive for the first layer.
Acetone vapor smoothing
suspend printed part above a small amount of acetone in a sealed container for 30-60 seconds. The vapor melts the surface layer, erasing layer lines.
Delamination fixes
If parts are delaminating, slow your print speed and raise chamber temperature rather than increasing print temp - high nozzle temps can degrade ABS chemistry.
Storage & Humidity
Target: below 25% RH
ABS absorbs moisture. Wet ABS pops during printing and delaminates between layers, so store it sealed with desiccant.
Drying
75-85°C for 8 hours. ABS's Tg (~105°C) means spool deformation is not a risk at drying temperatures.
Rule out wet filament
If you're getting unexplained layer splitting or delamination and your enclosure and bed temp are correct, wet filament is the first thing to rule out.
Bed Adhesion
Best surfaces
PEI with glue stick, glass with ABS slurry (ABS dissolved in acetone - very effective), garolite. ABS benefits from an adhesion aid on all common surfaces.
Recommended bed temp
100-110°C. An enclosure is necessary at this bed temp to prevent cold drafts from causing layer delamination and warping. A brim of 5-10mm is strongly recommended for any part with a large footprint.
ABS slurry
ABS slurry - a small amount of ABS dissolved in acetone brushed onto a glass or PEI surface - is the most reliable adhesion method for ABS and a traditional community solution. Apply thinly, let dry before heating the bed.
Keep the enclosure closed
Keep the enclosure door closed during the entire print. Even briefly opening it can cause a temperature drop that delaminate the current layer.
The ABS Grade Ladder
ABS grades are mostly about taming its two vices, warping and fumes, or pushing its one virtue, heat resistance, further. Prefixes work like everywhere else: HS = speed-tuned, HT = higher heat deflection, r = recycled; + usually means a low-warp reformulation rather than just toughening. The ladder, with live listings:
ABS
Classic ABS: ~100°C heat tolerance, sandable, acetone-smoothable, and determined to warp off an open-frame printer. Budget for an enclosure or buy something else; there is no third option at part sizes beyond a keycap.ABS+
Low-warp reformulations, led by eSUN’s: noticeably calmer on the bed, slightly less smelly, same end-use properties. About one ABS listing in five. If you are buying ABS in 2026 and not chasing a spec sheet, buy this tier.HS-ABS (+)
Speed-tuned ABS for enclosed CoreXY machines (Hyper and Rapid lines). The speed is real, but chamber temperature still decides whether big parts survive, so this grade rewards a sealed enclosure more than raw travel speed.HT-ABS
Pushes heat deflection above standard ABS, toward 110°C and beyond. For parts that sit near motors, hotends, or in engine bays. Check the datasheet per brand; “HT” spans a wide range here.ABS-CF / ABS-GF
Fiber-filled ABS: stiffer, more dimensionally stable, much less warp-prone than plain ABS. Glass-filled versions trade a little stiffness for a lower price. Hardened nozzle, enclosure still recommended.ABS-FR
Flame-retardant ABS (UL94 V-0 at the good end). Electronics enclosures, appliance parts, anything a safety reviewer will look at.r-ABS
Recycled ABS, mostly Fiberlogy. Prints like the virgin material with occasional color-batch variance. A fair way to make the least eco-friendly mainstream filament a little less so.Variants & Special Types
ABS-CFABS with carbon fiber reinforcement. Higher stiffness and better dimensional stability. Still requires an enclosure. Hardened nozzle required.
ABS ESDElectrostatic dissipative ABS for electronics manufacturing. Combines good temperature resistance with ESD protection.
ABS High SpeedFormulated for faster extrusion while maintaining the enclosure requirement. Useful for production-volume ABS printing.
References
- Prusa Knowledge Base - ABS. Print temperatures, styrene emissions, and enclosure requirements. help.prusa3d.com/article/abs_2058
- Bambu Lab Wiki - Filament Guide Material Table. Glass transition temperatures and printing parameters for common filaments. wiki.bambulab.com/en/general/filament-guide-material-table
Recommended Gear
Enclosure
3D printer enclosure
ABS needs an enclosure to prevent warping and reduce fumes. A grow tent style enclosure is the most affordable effective option.
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Dryer
Filament dryer
ABS absorbs moisture readily. A heated dryer at 75-85°C for 8 hours before printing prevents bubbling and poor layer adhesion.
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Adhesion
Acetone
For ABS juice (ABS dissolved in acetone) bed adhesion and vapor smoothing finished parts. A little goes a long way.
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Frequently Asked Questions
Does ABS need an enclosure?
An enclosure is strongly recommended for ABS. The material shrinks significantly as it cools, and uneven cooling in open air causes warping, layer splitting, and cracking - especially on larger prints. An enclosure maintains a stable ambient temperature of 40-60°C around the print, which dramatically reduces these issues.
Can you smooth ABS with acetone?
Yes. ABS dissolves in acetone, making vapor smoothing possible. Place your print in a sealed container with a small amount of acetone and let the fumes smooth the surface over 15-30 minutes. This melts layer lines and creates a glossy, injection-molded appearance. Acetone can also be used as a glue to bond ABS parts together.
Is ABS safe to print indoors?
ABS emits styrene and other volatile organic compounds (VOCs) as well as ultrafine particles (UFPs) during printing. Printing ABS in a well-ventilated space or with a printer enclosure that includes a carbon filter is recommended. Avoid printing ABS in bedrooms or small unventilated rooms. See our ventilation guide for filtration options.
Is ABS stronger than PLA?
ABS is tougher than PLA - it absorbs impacts and flexes before breaking rather than shattering. However, PLA actually has higher tensile strength and stiffness. ABS is the better choice for functional parts that experience repeated stress, vibration, or impacts. PLA wins for rigid parts that need to hold their shape under static load.
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