The purpose of ISO 11699-1 is to establish the performance of film systems. ISO 11699-1 is applicable for the classification of film systems in combination with specified lead screens for industrial radiography (non-destructive testing). ISO 11699-1 is intended to ensure that the image quality of radiographs - as far as this is influenced by the film system - is in conformity with the requirements of International Standards such as ISO 5579, ISO 17636 and EN 12681. ISO 11699-1:2008 does not apply to the classification of films used with fluorescent intensifying screens. The measurement of film systems in ISO 11699-1:2008 is restricted to a selected radiation quality to simplify the procedure. The properties of films will change with radiation energy, but not the ranking of film system quality. Additional methods for evaluating the photographic process are described in ISO 11699-2, by which the performance of film systems can be controlled under the conditions given in industry.