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Imaging materials. Films and paper. Determination of dimensional change Ingestion-build-98192 This International Standard specifies the1 Scope This International Standard specifies a method for determining the dimensional change of photographic films and papers caused by: variations in equilibrium moisture content due to change in the relative humidity (RH) of the atmosphere (humidity coefficient of expansion); change in temperature (thermal coefficient of expansion); processing; ageing. This International Standard deals with the moisture content and thermal history of the specimens