Safety

A category about 3D printing safety: VOC fumes from ABS, ASA and nylon at nozzle temperatures above 240 °C, ultrafine particles (UFP) from high-speed PLA above 200 mm/s, HEPA + activated carbon air filtration, electrical fire safety, and personal health during long sessions. A must-read for owners of open-frame printers, anyone running a printer in a living room or a kid's room, anyone working with photopolymer resin (nitrile gloves, IPA, waste handling), and anyone switching from PLA to engineering filaments with carbon fibre and aramid.

What to focus on first: ventilation and a dedicated room for ABS/ASA with at least 30 m³/h air exchange, a HEPA + activated carbon filter for a closed-loop setup, a smoke alarm in the printer room, an automatic power timeout, and a residual-current breaker on the printer line. Most FDM fires are not caused by an overheated nozzle but by wiring and unattended overnight prints. If you just bought an open-frame printer, start with the ventilation guide. If you are moving to ABS, read the UFP and VOC filtration guide. For photopolymer printers, see the IPA handling chapter.

Related reads: materials and emissions and routine maintenance to prevent failures.