FAQ - Does the purity of air (Oxygen or Nitrogen) affect the laser cutting quality? Anonym / Friday, September 10, 2021 0 461 Article rating: No rating Does the purity of air (Oxygen or Nitrogen) affect the cutting quality? Based on internal testing, higher purity levels result in higher cutting quality. Downside to this is that the cost of higher purified air is more costly. We suggest Oxygen purity of 99.8%(2N8) or higher. The purity of Nitrogen should be 99.995% (4N5) or higher. Read more