The amount of formaldehyde released from three chests of drawers made of plywood was determined throughout a year by the surface-absorption method mentioned in the previous report. The amounts released varied with temperature and humidity and the values in summer time (14.1-15.1μg/cm2·24 hr) were 2 to 3 times highter than in the other seasons (3.4-8.1 μg/cm2·24 hr). The amount released in the chest of drawers could be also estimated from the value obtained by the official desiccator-method by using pieces of boards used for the material of the chest. The released formaldehyde contaminated the pieces of cloths allowed to hang in the drawer : wool absorbed 230-580μg/g after 11 weeks, cotton 60-120μg/g after 2 weeks and in nylon and acrylic cloths formaldehyde was scarcely detected even after 2 weeks.
