Exposure
Relative Exposure Index
Exposure Orientation | System | Pulsed-Xenon | Tungsten or Quartz-Halogen |
| | | |
To emulsion | ISO (ASA/DIN) | 20/14 | 20/14 |
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These indexes are provided primarily as indicators of the relative speed of this film when compared with other Kodak graphic arts photographic materials. The pulsed-xenon value indicates the film's relative speed to pulsed-xenon illumination as measured by a light integrator. Index numbers for the other light sources can be used with photoelectric exposure meters to help establish trial exposures. A 2-times film-speed increase is indicated in the ASA system by doubling the index number and in the DIN system by increasing the number by 3.
Examples of Camera Exposures
•Line Exposure: For a same-size (1:1) line reproduction exposing with four 1500-watt pulsed-xenon lamps at 3 feet (0.9 metre) from the center of the copyboard, use a trial exposure of 8 seconds at f/22.
•Halftone Exposure: Make a trial exposure using a contact screen suitable for use with Kodak Camera 2000 films.
Example of Contact Exposure
Exposing with a variable voltage point-source lamp operated at 16 volts at a distance of 5 feet (1.5 metres) from the exposure plane—approximately 4 footcandles (43 lumens/square metre), use a trial exposure of 6 to 11 seconds (with a 1.0 neutral density filter), to the emulsion.
Filter Factors
When a filter is used, multiply the amount of unfiltered exposure by the filter factor shown below. Because lighting conditions vary, these factors may require adjustments.
Light Source | | Kodak Wratten Gelatin Filter | |
| No. 8 | No. 15 | No. 47B | No. 58 |
| | | | |
Pulsed-Xenon | 1.5 | 2.0 | 12.0 | 4.0 |
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Quartz-Halogen | 1.5 | 2.0 | 20.0 | 2.5 |
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