ASTM E 746 - 93. Standard Test Method for Determining Relative Image Quality Response of Industrial Radiographic Film

American Society for Testing and Materials (ASTM). Reapproved 1998, 5 pages.
This test method covers the determination of the relative image quality response of industrial radiographic film when exposed to 200-kV X rays. The evaluation of the film is based
upon the threshold visibility of penetrameter holes in a special image quality indicator (IQI). Results for a given film type may vary, depending upon the particular development system used.
It is, therefore, necessary to state the development system and geometric conditions used in this determination. By holding the technique parameters (except exposure time) and processing
parameters constant, the image quality response of radiographic film may be evaluated on a relative basis