3D Printed Materials Under Fire! PLA vs PETG vs ABS vs TPU – Which Burns Fastest? (2026)

Lighting 3D printed parts on fire is a risky endeavor, but it can also be an enlightening one. It's a fascinating experiment that reveals the varying degrees of flammability of different 3D printing materials. This experiment, conducted by Maker's Muse, showcases the diverse behaviors of various filaments when exposed to heat. The results are both surprising and insightful, offering a deeper understanding of the materials we use in 3D printing.

The materials tested included PLA, PETG, ABS, ASA, TPU, and PEBA. PLA, with its significant carbon content, burned readily, but an interesting variation was observed between PLA+ and Galaxy Black PLA. The latter required a blow torch to ignite and burned at a higher temperature, unlike the PLA+, which produced a dirty yellow flame. This highlights the importance of material composition and additives in determining flammability.

Interestingly, 'high temperature' PLA (HTPLA) resisted burning and self-extinguished after torch treatment. This suggests that the additives play a crucial role in the material's behavior. The experiment also revealed that black PETG was resistant to ignition, while ABS and ASA were highly flammable, burning with a sooty yellow flame. HIPS followed a similar pattern. TPU was the least flammable, even with a blow torch, and foam TPU burned more aggressively than regular TPU. ABS, ASA, and HIPS showed similar burning characteristics.

The findings indicate that PETG and regular TPU are the safer choices for 3D printing applications, as they are less likely to turn into a fire hazard. This experiment highlights the importance of material selection in ensuring the safety and stability of 3D printed objects. It also underscores the need for further research into the properties of different filaments to enhance the overall safety of 3D printing processes.

In conclusion, lighting 3D printed parts on fire is an eye-opening experiment that reveals the diverse flammability of various materials. It emphasizes the significance of material composition and additives in determining fire behavior. This knowledge is crucial for ensuring the safety and reliability of 3D printing, especially in applications where heat exposure is a concern. It also opens up avenues for further research and innovation in the field of 3D printing materials.

3D Printed Materials Under Fire! PLA vs PETG vs ABS vs TPU – Which Burns Fastest? (2026)

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