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This part of ISO 1183 specifies three methods for the determination of the density of non-cellular plastics in the form of void-free moulded or extruded objects, as well as powders, flakes and granules. - Method A: Immersion method, for solid plastics (except for powders) in void-free form. - Method B: Liquid pyknometer method, for particles, powders, flakes, granules or small pieces of finished parts. - Method C: Titration method, for plastics in any void-free form.