are classified in the different classes E1, E2, E3 (E1 = lowest pollutant emission). The output of formaldehyde is measured. The formaldehyde content of the air is measured in “parts per million” (ppm). The permissible limit value is 0.1 ppm and should not be exceeded. Laminates from SWISS KRONO are of class E1 and are therefore regarded as pollutant-free.