ISO 5799:1991 Preview
Photography -- Direct-exposing medical and dental radiographic film/process systems -- Determination of ISO speed and ISO average gradient
This standard was last reviewed and confirmed* in 2016.
*Therefore this version remains current
Specifies measuring methods so that the film/process system can be obtained reproducibly and can also be compared with those of other systems. Describes sensitometric procedures for films exposed directly to X-rays. This second edition cancels and replaces the first edition (1981).