Duplicate Films (4)

Question 1

Three ways to duplicate film

Answer 1

1. exposure two films simultaneously
2. specially formulated duplication film and UV light source
3. Digitization

Question 2

What other reasons might we use multiple films

Answer 2

increase latitude without sacrificing the use of a high-contrast film.

Question 3

Describe how two films can be used for a part of varying thicknesses?

Answer 3

Single cassette loaded with two high contrast films of differing speeds (fast for thick & slow for thin). Need to increase kilo-voltage to reduce total amount of subject contrast - also result in a reduction in image detail visibility.

Question 4

Duplicate exposure for the same radiograph would still. require an increase in ____ or the intensification factor would be diminished

Answer 4

kilovoltage

Question 5

Describe duplication via one-sided emulsion

Answer 5

Take the one-sided emulsion film after exposure, in a darkroom, place on a light source of the duplicator and exposure time is set. Emulsion side of film is placed against radiograph and sealed by a lid, both films are exposed and the duplicate is processed.