EN 321 : 2002
Wood-based panels – Determination of moisture resistance under cyclic test conditions
This is one of a series specifying methods of test for determining the behaviour of wood-based panels under the influence of moisture. Originally the standard dealt with fibreborards only but it has now been extended to all wood-based panels.
Test pieces are exposed to three cycles, each comprising of immersion in water, freezing and drying at elevated temperature. After cyclic treatment, the test pieces are then reconditioned and their swelling in thickness and residual strength is determined.