Ch. 9 Darkroom & Film Processing

The speed of a screen film refers to how fast the silver halide crystals in the emulsion respond to the light emitted from the intensifying screens.

• True

• False

A radiographic processing area should have a single entrance door that allows for absolute light proof fittings.

• True

• False

Low-speed screen film contains a thick emulsion and large crystals.

• True

• False

Radiographic film consists of two parts, the base and the emulsion.

• True

• False

The darkroom walls and floor should be covered with a porous surface.

• True

• False

​The relative humidity level in the darkroom should be maintained between:

• ​40% and 60%.

• ​40% and 50%.

• ​60% and 70%.

• ​60% and 80%.

​What is the source of a multicolored stain?

• ​poor rinsing

• ​old or oxidized developer

• ​exhausted or weakened fixer solution

• ​incomplete washing time

​Weblike marks that appear in the emulsion when there are extreme differences in processing solutions are called:

• ​crinkle marks.

• ​hesitation marks.

• ​guide shoe marks.

• ​reticulation.

Which of the following is NOT a step in film processing?

• developing

• ​maintenance

• fixing

• ​washing

Which of the following refers to the use of film whose sensitivity is correctly matched to the light spectrum emitted from the intensifying screen?

• spectral deflection

• spectral absorption

• light absorption

• spectral matching