image industrial radiography

What influcences the speed of film in radiography?

In radiography the relationship between exposure (in C/kg) and resulting density is com- monly referred to as film speed. Other than in normal photography where film speed is indicated by a DIN or ASA number, films for industrial radiography do not carry an inter- nationally recognised speed number.

The generally accepted method of measuring the film speed of radiographic films is to mea- sure the exposure required to achieve a density of 2.0 above base and fog, using a specific processing technique. The various relative exposure values are shown in table 1-8.

Listing of various Agfa films