Laser Printers 2.5 Laser Printers Ozone gas, which can be mild to severe irritant, is emitted in detectable levels by almost all laser printers and photocopiers, as a by-product of the electrophotographic process. Fortunately, ozone is an unstable molecule that quickly breaks down to oxygen. Proper setup and maintenance of laser printers can allow this natural process to occur unimpeded.
Ozone is produced only when the printer is printing.
To ensure that the level of ozone emissions is safe, laser printer manufacturers install a special filter, which is replaced regularly. Proper placement of your laser printer will help keep ozone concentrations at a safe level. If possible, place the printer in an open work area rather than in an individual's workspace. Make sure the exhaust fan blows away from people who sit nearby.