Does higher air pressure in CO2 lasers produce better results?

Yes, when cutting thick materials and with some materials, applying higher pressure can significantly improve the quality of the cut.

Increasing the pressure with the use of a compressor with higher efficiency allows you to work with a working pressure in the range of 0.1 - 3.0 bar for extremely difficult and thick materials. However, when engraving on most materials, it is better to use lower air pressure in the range 0.1 - 0.3 bar.