The Korean government ha s started control ling
indoo r air quality since 2004. The law fromthe Minis try
of Environme nt regula tes the use of pollutant emis sion
buildi ng mate rials and proh ibits the use of material s
that emit form aldehyde more than 1.25 mg/m2 h (JIS A
1901, small chamber method). This is equivalent to E2
grade ( 4 5 :0 ppm) when changed to the desiccator
method (JIS A 1460). Most suppliers and people are
concerned about how to reduce pollutants frombuilding
materials and how to control indoor air quality