Discusses the problem of formaldehyde emissions from UF resins used in particle board in North America. Describes tests done by Forintek Canada Corp to monitor formaldehyde emission. One of the experiments involves a test chamber with a controlled air change rate and designed to imitate domestic conditions. Air samples are withdrawn from the chamber through impingers containing distilled water which is analyzed for formaldehyde content. Also describes the 'Dessicator' and 'Perforator' methods of measuring formaldehyde emission.