Materials

PLA or PETG?

Both print beautifully on the Bambu Lab A1 in black or white. The right choice depends on where the part lives and what it has to survive.

Strength

PLA

Stiff and strong in static loads; can be brittle under impact.

PETG

Slightly less stiff but much tougher — absorbs impacts without cracking.

Flexibility

PLA

Low — snaps rather than bends.

PETG

Moderate — flexes and springs back, good for clips and snap-fits.

Temperature resistance

PLA

Softens around 55–60 °C. Keep out of parked cars and direct sun.

PETG

Comfortable up to ~75–80 °C. Fine for warm environments and enclosures.

UV / outdoor resistance

PLA

Degrades and fades with prolonged sun exposure.

PETG

Good UV and moisture resistance — the default for outdoor parts.

Print quality

PLA

Excellent — sharp corners, clean overhangs, the best-looking surface finish.

PETG

Very good, slightly glossier; fine details are a touch softer than PLA.

Best for

PLA

Prototypes, figurines, architectural models, jigs, indoor decorative parts.

PETG

Functional parts, brackets, enclosures, planters, anything outdoors or load-bearing.

Comparison of PLA and PETG properties
Property	PLAPolylactic acid	PETGGlycol-modified PET
Strength	Stiff and strong in static loads; can be brittle under impact.	Slightly less stiff but much tougher — absorbs impacts without cracking.
Flexibility	Low — snaps rather than bends.	Moderate — flexes and springs back, good for clips and snap-fits.
Temperature resistance	Softens around 55–60 °C. Keep out of parked cars and direct sun.	Comfortable up to ~75–80 °C. Fine for warm environments and enclosures.
UV / outdoor resistance	Degrades and fades with prolonged sun exposure.	Good UV and moisture resistance — the default for outdoor parts.
Print quality	Excellent — sharp corners, clean overhangs, the best-looking surface finish.	Very good, slightly glossier; fine details are a touch softer than PLA.
Best for	Prototypes, figurines, architectural models, jigs, indoor decorative parts.	Functional parts, brackets, enclosures, planters, anything outdoors or load-bearing.

Rule of thumb: if it's decorative or a prototype, choose PLA. If it clamps, carries load, lives outside or gets warm, spend the little extra on PETG. Still unsure? Mention what the part is for in the notes when you submit your quote — we'll flag it if the material looks wrong.

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