3D printer preparation
Once you select the right filament job, it’s time to prepare the printer. First, you need to keep it as clean as possible (outside and inside). You should try cold pull if you aren’t sure whether the extruder is clean enough. Then you should consider changing the brass nozzle for a stainless steel one: Brass nozzles (and even our hardened steel nozzles) might cause a health risk due to lead present in the alloy. Few sources also claim that it’s not wise to print with an extruder containing PTFE tube, due to Teflon toxicity at high temperatures. However, it releases only a small amount of toxic particles with temperatures exceeding 240°C and significant amounts with temperatures over 260°C. PTFE, therefore, poses no real danger if you print with PLA or PETG. If you are still not sure, try to use a special extruder without a PTFE tube.