scope:

This International Standard specifies four conventional methods for the determination of the mass of water absorbed by a plastic test specimen of defined dimensions that is immersed in water for a specified time and at a specified temperature. Two of the methods are for use when it is desired to take account of the possible presence of water-soluble matter. The four conventional methods specified are applicable to all plastics except cellular plastics and plastics that soften at the temperature of boiling water to an extent that causes them to lose their shape entirely. In the latter case, only tests at 23 ° C are applicable.