Formaldehyde is among the major indoor air pollutants. The main source of
formaldehyde emission indoors comes from the formaldehyde of
particleboard and MDF products. One of the first steps taken to reduce
pollution from formaldehyde was to standardize the emission from
particleboard into three classes: E1, E2 and E3 (TABLE 12) [5,8]. However,
acceptable levels of formaldehyde emission have been continuously reduced
in Europe over the last years. The corresponding lower limit for MDF (for E1
class) is 7.0 mg/100g. For both particleboard and MDF formaldehyde
emission, a correction of the perforator value to 6.5% board moisture content
should be made.