3D Printer Filament Comparison Chart: PLA, PETG, TPU, ABS and ASA

The short answer

For most makers in India, PLA+ is the right first filament: it prints on any open-frame machine, needs no enclosure, and produces crisp dimensional detail. Move to PETG when a part must survive knocks, warmth and cleaning chemicals; TPU when it must flex; and ABS or ASA only when you genuinely need heat and UV performance — and already own an enclosed printer.

What does a 3D printer filament comparison chart actually compare?

Every filament printer works the same way. A continuous strand of thermoplastic is fed into a heated nozzle and laid down layer by layer — the process the industry calls fused filament fabrication. Because the material is the process, the same properties decide success every time:

• Nozzle temperature window — the range where the polymer flows without degrading
• Shrinkage and warp — how much the part pulls as it cools
• Layer adhesion — whether new layers fuse to old ones or split along layer lines
• Stiffness versus flex — whether the finished part bends or snaps
• Heat tolerance — the point where the part starts to soften
• Moisture uptake — how much water the filament drinks out of humid air

A chart is only useful if it reports those six things honestly. "High strength" on a spool label is not comparable between brands, because every brand tests it differently.

The five-filament comparison chart

Two honest caveats. First, the temperature windows above are the ranges most brands publish; exact values differ by brand, colour and even pigment. Second, the price bands are approximate 2026 Indian retail ranges — filament prices change, so verify current listings before buying.

PLA and PLA+: why it is the default for a first spool

PLA melts somewhere around 150–160 °C and sits in the 1,210–1,430 kg/m³ density range depending on grade, according to the polylactic acid reference data. In practice it prints clean on the cheapest open printers, sticks to plain PEI or glass without a heated chamber, and holds fine letterforms better than anything else on this list.

PLA+ is PLA with additives that improve toughness and layer bonding — the same base polymer, less brittle along layer lines. That difference matters most on thin features: narrow letter shapes, thin plates, small hooks.

The trade-off is heat. Above roughly 60 °C, PLA-backed parts begin to soften and creep under load. In an Indian summer, a dark car dashboard easily exceeds that. A PLA+ keychain in a pocket or on a wall is fine for years; the same keychain left on a dashboard is not. That is a real limitation, not a marketing point.

What is PETG better at than PLA?

PETG is PET with glycol added to slow crystallisation, which makes it clearer and easier to print. PET itself melts above 250 °C and is practically insoluble in water — which is why the same polymer family has been used for drink bottles for decades.

In print terms, PETG buys you three things over PLA:

1. Toughness. It bends before it breaks, so it survives drops that crack PLA.
2. Warmth and chemical tolerance. Better in a hot car and against alcohol-based cleaners.
3. Water and fuel resistance. A genuine advantage for anything that lives outdoors or on a bike.

The costs are real too. PETG strings aggressively, shows every scuff as a glossy mark, and because it stays slightly springy, very fine raised text looks softer than the same text in PLA+. For crisp tiny lettering, PLA+ still wins.

When does TPU actually make sense?

TPU is a thermoplastic elastomer — flexible and elastic, with good resistance to impact, abrasion, oil and grease, per the thermoplastic polyurethane reference. It is the only filament here that returns to shape after being squashed.

That makes it the correct answer for phone bumpers, gaskets, feet, anti-vibration pads, cable organisers and flexible strap loops. Hardness is measured on the Shore A scale: 85A is soft and stretchy, 95A is firm enough to print on a direct-drive extruder without a special setup.

Where TPU loses: it prints slowly, it hates long retraction, and it cannot hold sharp letterforms. If your part needs to be readable, TPU is the wrong material.

ABS vs ASA: which one for parts that live outdoors?

ASA was developed as an ABS alternative with improved weather resistance. Its UV resistance and mechanical properties make it a strong choice for outdoor fused filament applications, and it is widely used in the automotive industry for exactly that reason. ABS sits at a median density of about 1.07 g/cm³ per its property data.

In day-to-day printing they behave alike: both warp hard, both need an enclosure, both smell, and both want ventilation. The decision is simple — if the part will sit in sunlight for months, choose ASA; if it only needs to survive heat indoors or in a car, ABS is usually cheaper and easier to source. Neither is a good fit for a keychain that lives in a pocket, where their impact behaviour is worse than PLA+ or PETG.

Also check your printer's rated maximum hotend temperature before running either. Many stock hotends are rated well below the 240–260 °C these materials want, and exceeding that rating is a hardware-safety question, not a settings tweak.

How much does filament cost per print in India?

Price per kilogram is the wrong number to shop on. Cost per finished print is the number that matters.

Take one kilogram of PLA+ and a typical 16 g keychain:

Electricity is the smaller line item. A typical desktop FFF printer draws well under 200 W average while printing, so a two-hour part is around 0.2–0.4 kWh. At Indian domestic tariffs, that is a few rupees. The bigger hidden costs are failed prints and wasted colour changes, which is why drying and dialling in a new spool properly pays for itself.

This is also why material choice barely moves the price of a finished personalised product. PETG costing 20% more per kilogram changes the part cost by a couple of rupees — while switching away from the wrong material can wreck the whole batch.

What to check before you switch filaments? A six-step sequence

1. Read the manufacturer's data sheet. Use their nozzle and bed window as the starting point, not a forum post.
2. Dry the spool. PLA and PETG both print badly when wet; stringing and popping are the tell.
3. Print a temperature tower. Five degrees up or down is often the difference between weak layer lines and clean ones.
4. Fix the first layer first. Ninety per cent of adhesion problems are actually a first-layer problem.
5. Tune retraction for the new material. PETG wants far less than PLA; TPU wants almost none.
6. Print one small real part, not a benchmark cube. A letter or a hook exposes the failure modes that matter for your product.

Mistakes that waste spools

• Assuming layer bonding is automatic. Layer adhesion is a temperature and speed problem — printing cooler and faster looks cleaner and breaks sooner.
• Trusting "strength" labels. Compare published numbers, not adjectives.
• Switching brands mid-project. Diameter tolerance and pigment loads differ enough to change your tuned settings.
• Ignoring shelf life. Moisture and dust degrade a spool left open in a Coimbatore monsoon.

Where filament choice shows up in finished products

Material choice is invisible until it fails. A personalised item is judged on whether it still looks right after a year in a pocket, a bag or on a bike keyring.

That is why the products we make at Nuho India — custom 3D printed keychains and desk decor — are printed in PLA+ at around 215 °C, with letters fused into a continuous backing plate rather than glued on as brittle cut-outs. It is a deliberate trade: PLA+ is not the most heat-resistant filament on this chart, but for a keychain or a shelf piece it gives the best combination of crisp letterforms, light weight at roughly 14–18 g, and enough toughness to survive daily pocket life. You can see the full range of custom 3D printed keychains and decor here.

If you want the cost side of that in detail, we broke down what 3D printed keychains actually cost in India and why the ₹129–₹149 band exists. If you are choosing a material for gifting rather than for a machine, the same reasoning applies in our guide to PLA+ durability and personalised name keychains.

And if your spool is for something bigger than a keyring, the same material logic scales straight into 3D printed home decor and desk pieces — where PLA+ handles the detail and PETG or ASA takes over for anything that sits in direct sun.