Concerning the construction and processing of radiographic film:

Most films typically have a single layer of emulsion

An emulsion of silver iodide is most commonly used

The grain size of the emulsion is directly related to the speed of the film

Production of the latent image occurs independently of the cation component of the emulsion

Altering the order of the processing of exposed film does not significantly affect the overall image quality

Concerning the properties of radiographic film:

Optical density is a measure of film blackening based on the degree of transmission of incident light on the film

Using double-sided emulsion has no effect on optical density

The greater the optical density of a film, the lower the intensity of the transmitted light beam

A useful range of optical densities is approximately 0.25–4

Different optical densities in areas within the same film are what produce image contrast when viewing the image

Concerning the properties of radiographic film, with reference to the characteristic curve:

‘Base plus fog’ refers to the optical density of unexposed, undeveloped emulsion

Films with high speed are less sensitive to changes in exposure

Film latitude refers to the range of exposures producing film darkening within the useful optical density range

An increase in film gamma decreases film latitude

[…]