PLA vs PETG vs ABS: Which Filament Should You Use?
Design and making background since school. Bambu Lab owner — regularly printing projects with my kids and practical fabrications around the house. 3D printing sits right where design thinking meets problem solving.
The material you print in determines what your parts can do. PLA is the right starting point — forgiving, consistent, perfect for learning. PETG is what you reach for when you need parts to actually survive. ABS exists for a narrow set of high-heat applications and mostly causes headaches getting there.
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PLA: Start Here Everyone starts with PLA. Print at 190-220°C nozzle, 50-60°C bed, and it just works. No warping, no smell, no drama. The Amazon Basics PLA (around £13/kg) is solid value with nearly 19,000 reviews on Amazon.
The catch? PLA is brittle. Drop a PLA part on a hard floor and it'll crack. Leave it on a car dashboard in summer and it'll warp into modern art. It handles about 50-60°C before softening.
For display pieces, prototypes, and anything staying indoors, PLA is perfect. we'd say 80% of what most hobbyists print is fine in PLA.
PETG: The One Most People Should Graduate To Once you're comfortable with PLA, PETG is the obvious next step. It prints at higher temps (230-250°C nozzle, 70-80°C bed) and you'll get more stringing at first. Slow down your print speed and dial in retraction, and it behaves well.
The OVERTURE PETG (around £15/kg) is a good starting point. Much tougher than PLA. Where PLA snaps, PETG flexes and absorbs impact. Good layer adhesion means stronger functional parts. Handles 70-80°C before softening, which means it survives British summers.
PETG also doesn't absorb water, making it suitable for outdoor use, plant pots, and anything that might get wet. If you need parts that actually do something, PETG is probably your material.
ABS: Old School, High Maintenance ABS was the standard before PLA took over. It's tough, heat-resistant (handles around 100°C), and you can smooth it with acetone vapour for a glossy finish. Those are real advantages.
But. You need an enclosure. You need ventilation. Print settings are demanding (230-260°C nozzle, 90-110°C bed). Without an enclosed chamber, ABS warps aggressively. The fumes are unpleasant and you shouldn't be breathing them.
Most people who think they need ABS actually need PETG. Unless you're printing parts for under-bonnet automotive use or something that'll sit near a heat source above 80°C, skip ABS. For outdoor parts where UV is the concern, look into ASA instead.
Quick Comparison
| PLA | PETG | ABS | |
|---|---|---|---|
| Ease of printing | Easy | Moderate | Hard |
| Strength | Brittle | Strong & flexible | Tough |
| Heat resistance | ~55°C | ~75°C | ~100°C |
| Enclosure needed | No | No | Yes |
| Post-processing | Sand, paint | Sand, paint | Acetone smoothing |
| Safety | No fumes | Minimal | Ventilation required |
| Cost (quality) | £15-20/kg | £15-25/kg | £18-25/kg |
What we'd Recommend Start with PLA. Seriously. Learn your printer, get your settings dialled in, understand what good layer adhesion looks like. SUNLU PLA Plus (around £18/kg, often discounted) is a good step up from basic PLA with better toughness.
Once you're printing functional parts that need to survive real use, move to PETG. The learning curve is small and the results are worth it.
ABS? Skip it unless you have a specific reason and an enclosed printer with ventilation. we're not being dramatic. Most of r/3Dprinting will tell you the same thing.
Don't Cheap Out on Filament Cheap filament causes more failed prints than bad settings. Budget £18-25/kg for reliable results. For critical prints where dimensional accuracy matters, Prusament PLA (around £32/kg) is the gold standard with ±0.02mm precision. And store your filament properly. Moisture ruins everything, especially PETG and ABS. See our filament storage guide for the simple setup.
## Print Settings by Material
Getting the temperatures and speeds right matters more than brand choice. These are reliable starting points.
PLA: - Nozzle: 200–215°C (start at 205°C, tune from there) - Bed: 50–60°C (PEI spring steel, no adhesive needed) - Print speed: 40–80mm/s for quality; up to 150mm/s for functional prints - Cooling: Maximum fan speed after first layer - Retraction (direct drive): 0.8–1.5mm at 35mm/s - Retraction (Bowden): 4–6mm at 45mm/s
PETG: - Nozzle: 230–250°C (start at 240°C) - Bed: 70–85°C (apply glue stick to PEI to prevent over-adhesion) - Print speed: 30–60mm/s (PETG is slower than PLA for best results) - Cooling: 50–75% fan (too much cooling causes layer delamination) - Retraction: Same as PLA — PETG strings, but more retraction causes jams. Dry filament first if stringing persists. - Enclosure: Not required but improves layer adhesion on large parts
ABS: - Nozzle: 240–260°C - Bed: 100–110°C with PEI or BuildTak + glue stick - Print speed: 30–50mm/s - Cooling: Off or minimal (cooling causes warping and layer cracking) - Enclosure: Required. ABS warps severely without one. - Ventilation: Required. Styrene fumes are unpleasant and potentially harmful with extended exposure.
## TPU: The Flexible Option
TPU (thermoplastic polyurethane) is worth understanding even if you don't plan to use it immediately. It's in a separate category from PLA, PETG, and ABS.
What it does: TPU is flexible. Shore hardness 95A (the most common type) bends under load and springs back. Shore 85A is noticeably softer. This makes it useful for phone cases, cable tidies, gaskets, hinges, bumpers, and any part that needs to absorb shock rather than resist it.
What it requires: Direct drive extruder. Bowden printers struggle with flexible filaments because the compliance in the PTFE tube causes the material to buckle and jam. See our direct drive vs Bowden guide for more detail.
Print settings: Nozzle 220–235°C, bed 40–50°C, slow (25–40mm/s), minimal retraction (0.5mm or less). Speed is the most important variable — printing too fast is the primary cause of TPU jams.
## Filament Quality: Does Brand Matter?
Budget vs premium filament is a real difference, but not in the way most people assume.
What budget filament does well: Prints successfully for most applications. A £15 spool of eSUN or SUNLU PLA produces excellent results when your printer is properly calibrated. For learning and prototyping, cheap PLA is fine.
Where premium filament earns its cost: Dimensional consistency. Premium filaments like Prusament maintain ±0.02mm diameter tolerance throughout the spool. Budget filaments often vary more — not enough to cause obvious failures but enough to affect fine details and consistent extrusion on complex prints.
The practical rule: Use budget PLA (£15–22/kg) for learning, prototyping, and functional prints. Upgrade to Prusament or Polymaker for anything where appearance or dimensional accuracy matters. PETG from any reputable brand (eSUN, Overture, Polymaker) performs well — the quality gap between budget and premium is smaller than with PLA.
## Moisture: The Hidden Problem
Filament absorbs moisture from the air. This is the cause of more mysterious print quality issues than any other single factor.
Signs of wet filament: - Popping or crackling sounds during printing (steam escaping from the nozzle) - Rough, bubbly surface texture - Stringing that persists despite correct retraction settings - Weak layer adhesion causing brittle prints
Which materials are most sensitive: - PETG: Very hygroscopic. Absorbs moisture quickly. Open spool left in a humid room degrades noticeably within days. - Nylon: Even more sensitive than PETG. Must be dry-stored and ideally printed from a dry box. - PLA: Moderately hygroscopic. More forgiving than PETG but still affects quality after extended exposure. - ABS: Less sensitive than PETG but still benefits from dry storage.
Prevention and treatment: Store filament in sealed bags or airtight containers with silica gel desiccant. A basic dry storage setup costs under £10. A filament dryer (SUNLU, Creality, eSUN all make them for £25–40) rescues wet filament in 4–8 hours at 45–65°C depending on material. Worth owning if you print regularly or live somewhere humid.
## Material Selection Quick Reference
| Project Type | Material | Why |
|---|---|---|
| Learning, first prints | PLA | Easiest, cheapest, most forgiving |
| Display pieces, decorative | PLA | Good surface quality, wide colour range |
| Phone mount, car parts | PETG | Heat resistant above 60°C |
| Functional brackets, hinges | PETG | Impact resistant, flexible enough not to crack |
| Outdoor items | PETG or ASA | Weather and UV resistant (ASA better for UV) |
| Flexible parts, phone cases | TPU | Bends rather than breaks |
| High-heat applications | ABS or ASA | Sustained heat resistance above 90°C |
| Prototyping | PLA | Fast iteration, cheap |
Start with PLA. Get your printer dialled in and print things you are proud of. Move to PETG when a functional part needs to actually survive real use. That is what makers do: use the right material for what the part needs to do. Still choosing your first printer? Our beginner printer guide covers the best options. Already printing? Check our [FDM vs resin comparison](/guides/fdm-vs-resin-printer) if you're curious about the other side.
## Filament Brand Comparison by Material
The brand you choose matters more for some materials than others. PLA is forgiving enough that even budget options usually print well. PETG and ABS have tighter tolerances that expose quality differences.
PLA recommendations: - Overture PLA: Consistent diameter, prints reliably, good colour range. Around £16/kg. *(Price when reviewed: ~£16 | View on Amazon)* - Prusament PLA: ±0.02mm diameter tolerance, the reference standard. Around £30/kg. *(Price when reviewed: ~£30 | View on Amazon)* - Budget options (eSun, Sunlu at £12-14/kg): Adequate for non-critical prints, more variable quality between batches.
PETG recommendations: - Sunlu PETG: Good performance for the price. Around £18/kg. *(Price when reviewed: ~£18 | View on Amazon)* - Prusament PETG: The premium option with consistent results and a wide colour range. Around £28/kg. *(Price when reviewed: ~£28 | View on Amazon)*
ABS/ASA recommendations: ABS has largely been superseded by ASA for most applications where UV resistance and heat tolerance matter. ASA offers similar mechanical properties with significantly better UV stability and reduced warping compared to ABS. - Prusament ASA: The reference ASA with reliable results. Around £28/kg. *(Price when reviewed: ~£28 | View on Amazon)*
## When to Use Each Material: Decision Guide
The choice isn't just technical — it's about matching the material to the job.
PLA is right for: Decorative prints, prototypes, miniatures and display models, indoor objects that won't experience heat or impact stress, anything you want to print quickly with minimal fuss. The majority of hobby printing is PLA, and rightly so.
PLA is wrong for: Car dashboards, outdoor use (degrades in UV within months), anything near heat sources (kitchen, near electronics), functional parts under sustained load.
PETG is right for: Kitchen accessories (food-safe when printed with appropriate nozzle and settings), outdoor objects with moderate UV exposure, functional clips, brackets, and mechanical parts, storage containers, anything that needs more durability than PLA without the difficulty of ABS.
PETG is wrong for: High-precision fits (it has more flex than PLA, tolerances shift), very fine detail (the necessary heat and slower print speed reduce crispness), parts needing maximum strength (nylon or CF composites are stronger).
ABS/ASA is right for: Outdoor enclosures, garden items, automotive exterior parts, anything in direct sunlight, engineering housings that need dimensional stability above 60°C.
ABS/ASA is wrong for: Beginners without an enclosure, home interiors (fumes require ventilation), decorative printing where surface quality matters most.
## Moisture Sensitivity at a Glance
| Material | Risk | Symptoms When Wet | Prevention |
|---|---|---|---|
| PLA | Low | Slight texture roughness, minor stringing | Sealed container |
| PETG | High | Heavy stringing, bubbles, rough surface | Sealed + desiccant, dry before use |
| ABS | Medium | Brittleness, poor layer adhesion | Sealed + desiccant |
| ASA | Medium | Similar to ABS | Sealed + desiccant |
| TPU | High | Sticky extrusion, blobs, inconsistency | Always dried before use |
| Nylon | Very High | Severe stringing, structural weakness | Dry before every print |
## Slicer Profiles: Key Settings by Material
Starting point settings for a 0.4mm nozzle. These are baseline recommendations — your specific printer and brand of filament may need adjustment.
PLA: Nozzle 200-220°C, bed 60°C, part cooling fan 100%, retraction 0.5-1.5mm (direct drive) or 4-6mm (Bowden), speed 50-80mm/s. PLA tolerates variation well — if unsure, start at the lower end of the temperature range.
PETG: Nozzle 230-250°C, bed 70-85°C, part cooling fan 30-50% (too much cooling causes layer delamination), retraction 1-3mm (direct drive) or 4-7mm (Bowden), speed 30-50mm/s. PETG benefits from slower print speeds and reduced cooling. Disable "wipe on retract" to reduce stringing.
ABS: Nozzle 230-250°C, bed 100-110°C, part cooling fan off or minimal, enclosure required, retraction 1-2mm (direct drive) or 5-7mm (Bowden), speed 40-60mm/s. Drafts cause warping and layer splitting — eliminate all air movement around the printer.
ASA: Similar to ABS. Nozzle 240-260°C, bed 90-110°C, no part cooling, enclosure strongly recommended. More forgiving than ABS regarding warping, but still needs stable temperature.
## What the Hobbyist Community Prints Most
Based on popular categories on Printables and Thingiverse, the practical material breakdown works out roughly as:
- PLA: Miniatures, organizers, phone stands, cable management, household hooks, decorative pieces, cosplay props, gifts — approximately 80% of hobby printing - PETG: Kitchen items, bathroom accessories, outdoor clips and mounts, functional brackets — approximately 15% - ABS/ASA: Automotive parts, outdoor enclosures, garden fixtures, anything in direct sunlight — approximately 3-5%
If you're just starting, you can go months or years printing almost exclusively PLA and never feel limited. The other materials are tools for specific jobs, not improvements over PLA for general use.
## Composite and Specialty Materials
Beyond the standard three, several specialty materials are worth knowing about as your experience grows.
PLA+ / Tough PLA: Enhanced PLA formulations with better impact resistance and layer adhesion. Prints like standard PLA with slightly higher temperatures (215-225°C). A good step up from PLA for functional parts without the difficulty of PETG.
Carbon fibre composites (CF-PLA, CF-PETG): Short carbon fibre strands mixed into the base material. Significantly stiffer than standard versions, lower weight. Requires a hardened steel nozzle — carbon fibre destroys brass nozzles within hours. Produces a distinctive matte finish.
TPU (thermoplastic polyurethane): Flexible filament that prints like very thick, sticky rubber. Shore hardness varies by product — 95A for moderately flexible parts, 85A for very soft. Useful for phone cases, gaskets, flexible hinges, and protective bumpers.
These materials expand what's achievable but add complexity. Master PLA and PETG first. Once your printer and calibration are dialled in, specialty materials become straightforward extensions rather than challenges.
## Ready to Buy a Printer?
Now you know the materials, you need a printer that handles them well. Our [best 3D printer guide](/guides/best-3d-printer-uk) ranks the top FDM machines by budget. For the best value picks, see best 3D printer under £500 — all five handle PLA and PETG out of the box.
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