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Log Relative Exposure
Log Relative Exposur
20 23
Fig. 7. Integral density curves of color Fig. 8. Integral density curves of color dupe negative film, Type 846. positive release printing film, Type 848
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WAVELENGTH IN MILLIMICRONS
Fig. 9. Spectral sensitivity of color positive printing film, Type 848.
quality. For interior illumination the overall color balance should be approximately 5400 K. While the overall color balance is not critical, it is important that the different light sources on a set be balanced to the same spectral quality. The use of ultraviolet filters, such as Ansco UV-16 or Wratten Filter No. 1, for outdoor exposures and indoor exposures with arc lights is recommended.
Absorption Characteristics: The dye images recorded in the color negative film are in colors complementary to the colors of the original. The absorption characteristics of the dyes in the color negative film are illustrated in Fig. 6.
The absorption maxima are: yellow, 440 m/i, magenta, 540 rmi and Cyan, 675
Sensitivity and Resolving Power: The color negative film has an exposure index of 16. The resolving power, as measured by the method proposed by Sayce,4 is 44-48 lines/mm.
Ansco Color Duplicating Negative Film, Type 846
Film Characteristics: The Color Dupe Negative Film is similar to the Color Negative Film Type 843 in layer arrangement and color absorption characteristics. However, the color sensitivity is
Herman H, Duerr; Color Negative-Positive
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