European standards recommended in 2000 by the European Panel Industry defined formaldehyde emissions ratings. Original ratings included E1, measuring 9mg/100g and below, E2, measuring greater than 9mg/100g to below 30mg/100g, and E3, measuring a greater than 30mg/100g ratio. Pressure for more stringent standards led to a new ratings classification, E0, based on emissions measuring 0.5mg per liter and below. Europeans test methodology is based on the Perforator Test Method, which measures the formaldehyde levels inside the wood specimen.
Japan has also defined formaldehyde emissions ratings. The Japanese JIS/JAS Formaldehyde Adhesive Emission Standards, defined by the set forth by the Japanese Industrial Standards (JIS) and Japanese Agricultural Standards (JAS) departments, use a different testing methodology, the Desiccator Test Method which measures emissions released from the wood. Ratings are assigned in four categories, F*, F**, F***, and F****, with F**** having the lowest level of formaldehyde emissions below 0.005 mg/m2h. Comparing these two standards is difficult due to the different methods and to different units of measurement.
The United States has been slow to address this concern, but a rating system released in 2007 by the California Air Regulatory Board (CARB) aims to correct that. The Airborne Toxic Control Measure (ATCM) specifies staggered implementation dates ranging from 2009 to 2010 (depending on product) for a two-phase plan that calls for compliance on emissions levels in particleboard, MDF, thin MDF and hardwood plywood. CARB studies suggest that up to 5% of formaldehyde emissions are generated by composite wood products.
Phase 1 of the CARB plan already in effect requires that adhesive formaldehyde emissions measure equal to or less than 0.08 ppm (parts per million), a figure that exceeds OSHA standards already in play.
Phase 2, set for January 1, 2010, will force formaldehyde emissions in adhesives even lower, to 0.05 ppm, a higher standard than that of the European E0.
Read more: http://learn.builddirect.com/home-improvement-info/formaldehyde-emissions/#ixzz3bVvDFH6O