Worst Case Scenario with a Acetone Vapor Bath
Why 3D Printing Stack Exchange recommends it
3D Printing Stack Exchange answerers link it when arguing that acetone vapor smoothing carries a real but limited fire risk and is unlikely to explode.
Recommended by 0 people across 0 different months, 2016 to 2017.
What it is
A very short 2013 clip by Neil Underwood showing what ignited acetone vapor looks like when a jar of acetone vapor is lit. It is meant to show that the vapor burns rather than explodes unless the jar is sealed, and the description warns against blowing into the jar.
What people said
Cites Tom van der Zanden · 2016-01 · 3D Printing Stack Exchange · on “Safety precautions when using acetone”
Contrary to what the other answers suggest, the risk of fire is not that great [this video] . An acetone "explosion" is even more unlikely, since you need a ratio of 2.5%-12.8% acetone vapor to air for that: too much acetone (as would be the case inside of your smoothing vessel) and nothing happens, too little (as would be the case inside of a badly ventilated room) and nothing happens either. Note that even if you were working in a completely non-ventilated, ridiculously small 1m^3 room you'd still need to evaporate over half a liter of (liquid) acetone to reach that bare minimum 2.5%. In any case, well before you got into the "danger zone" the air would become unbreathable. So, then what should
Cites Leo Ervin · 2016-02 · 3D Printing Stack Exchange · on “My heated glass print bed keeps chipping and cracking. How can I prevent this?”
I don't think you really need a fire extinguisher for acetone, though one is recommended next a 3d printer. The way it burns is not that dangerous also taking into acount what a thin layer you will be applying [this video]
Cites Morgoth · 2017-05 · 3D Printing Stack Exchange · on “How do I give 3D-printed parts in ABS a shiny smooth finish?”
Acetone can be used to smooth ABS. [LINK] The left has been smoothed by an acetone bath and the right is the original model. (Image credit: Andrew Sink [LINK] ) Take note : acetone is dangerous to breathe in, so work in a well ventilated area. It is also flammable [this video] . Warm acetone vapour bath using stove This method involves suspending the model in a glass jar of boiling acetone that is heated up by a pot of boiling water. Attach the model to the lid of the jar with some string, keep the string short, so the model is close to the lid. Put a few centimetres of water in a pot Place a rag at the bottom of the pot (to keep the jar stable). Place the glass jar in the pot, on top of the rag.