How to Choose a 3D Printing Material: PLA vs PETG

For 99% of customer orders two materials are enough: PLA for visual parts and prototypes, PETG for mechanically or thermally stressed and outdoor applications. We standardly print in these two materials plus their decorative variants PLA Silk and PLA Galaxy. For specific requirements (flexibility, extreme heat resistance) we handle the job case-by-case.

The success of any 3D printing project depends not just on a precise model and correct printer settings, but above all on choosing the right material. In this article we look at the materials we routinely work with and help you decide between them.

Why does material choice matter so much?

The wrong material leads to failed parts, wasted money and frustration. Imagine printing a garden tool holder from PLA — it will deform in the sun, because PLA softens around 60 °C. Every material has strengths and limits, and understanding them is the foundation of a durable, functional print.

PLA: the economical choice for visual parts and prototypes

PLA (polylactic acid) is a biopolymer made from renewable resources such as corn starch. It is the most used material in 3D printing — and for good reason.

When to pick PLA:
- Decorative items, figurines, models, statuettes.
- Quick visual prototypes for shape and design verification.
- Indoor parts not exposed to high temperatures.
- Educational and presentation pieces.
Properties: Easy to print, fine detail, wide colour palette, economical price, biodegradable. Heat limit around 60 °C.

PETG: the tough choice for functional and outdoor parts

PETG (Polyethylene Terephthalate Glycol) is a tough, dimensionally stable material with elevated heat resistance (around 70 °C), moisture resistance and good chemical resistance against many acids, bases and alcohols. It is the ideal "functional" material — significantly stronger than PLA while still easy to print.

When to pick PETG:
- Mechanically stressed parts (mounts, gears, hinges).
- Outdoor parts with normal weather exposure.
- Parts in contact with water or moisture.
- Functional prototypes for real-world testing.
- Parts where dimensional stability matters.
Properties: High toughness, good impact resistance, resistant to many chemicals, dimensionally stable.

PLA Silk and PLA Galaxy: decorative finishes

For projects where appearance matters, we also offer special PLA variants:

PLA Silk — PLA with a smooth, metallic sheen. Great for showcase pieces, gifts and decorative figurines.
PLA Galaxy — PLA with embedded glitter particles that create a starry-sky effect. Ideal for art pieces, jewellery and statement decor.

Both variants keep the easy printability of PLA but add a finish that plain PLA cannot match.

Comparison table

Material	Heat limit	Main strengths	Typical use
PLA	up to +60 °C	Easy to print, fine detail, economical	Decoration, figurines, visual prototypes
PETG	up to +70 °C	Toughness, dimensional stability, chemical resistance	Mechanical parts, outdoor use, functional prototypes
PLA Silk	up to +60 °C	Metallic sheen	Decorative items, gifts
PLA Galaxy	up to +60 °C	Glitter effect	Art pieces, jewellery, unique decor

How to pick the right material for your project

Ask yourself:

Where will the part live? (Outdoor/indoor, hot/cold, in contact with water?)
What mechanical load will it bear? (Tension, compression, bending, impact?)
How important is appearance? (Matte, glossy, glitter effect?)
How important is price? (PLA is standardly cheaper than PETG.)

A simple rule covers most cases: PLA for visual and indoor parts, PETG for mechanical and outdoor parts.

Need a specialty material?

Some applications need a material outside our standard catalogue — extreme heat resistance, flexibility, biocompatibility or specific chemical resistance. We handle these jobs case-by-case: tell us what you need and we will agree on a concrete solution.

Get advice and a print from professionals

Picking the right material is critical, but it does not have to be complicated. Our team has extensive experience with PLA and PETG (and their decorative variants) and we will gladly help you pick the most suitable material for your project.

Get in touch today and let us talk through your project!