The purpose of this standard is to fix the performance of film systems. This standard is applicable for the classification of film systems in combination with specified lead screens for industrial radiography (non-destructive testing). This standard is intended to assure that the image quality of radiographs - as far as this is influenced by the film system - is in conformity with the minimum requirements of European standards such as EN 444. This European standard does not apply to the classification of films used with fluorescent intensifying screens.