We have a hackerspace running a 60W CO2 laser with everything that can be run through a laser- acrylic & plywood are most common, cardboard, MDF, paper, all that happens too. But not cutting metals, of course.

Does anyone have experience running nitrogen through the Air Assist cone? Well it's inert, it should be superior at suppressing flame and improve the cut.

But I hear different things. Some sources say "amazing, night and day!", others say "it doesn't help over regular air". But not a lot of evidence either way. People who have actually used nitrogen are few and far between.

Google hits are heavily contaminated by industrial info on using nitrogen for slicing through steel with >1000W lasers or fiber lasers. Not relevant, but hard to filter out.

I'd really like to know more about this process in cutting these nonmetallic items with low-power laser cutters.