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Fig. 3. Modified Bell & Howell Model D Printer with filter bins. A: feeding
bin; B: receiving bin. Filter passes from feeding bin to position in
front of light, to receiving bin.
obtain normal transmission through the optical system, since the positive stock is a monopack film, it is necessary to redevelop the track area with an application of a viscous solution containing a high-energy developer. With the track area so treated there is no difference in sound level between this type of color print and a normal black-and-white print.
When 16mm color prints are required they are made from a 35mm "soft" color print by optical reduction to a 16mm color duplicating stock. The sound is optically reduced from a 35mm re-recorded direct positive track.
A satisfactory 35mm black-and-white negative can be produced by using the original color negative to print a finegrain master print on Eastman 5365 stock and by developing this to a gamma of 1.2. From this, a duplicate negative is made on Eastman 5203 or similar duplicating negative material. This duplicate negative is developed to a gamma of 0.66.
The commercial producer works with
out benefit of large budgets and he must turn out color motion pictures under conditions not always conducive to extensive production conveniences. The producer who wishes to operate with a minimum crew and regular black-andwhite camera equipment, may use a multipurpose color film described in this paper to good advantage.
(The demonstration reel consisted of: first, a 35mm color print, followed by portions of the same footage in 35mm black-and-white print from the dupe negative.)
References
1. Reid H. Ray, "Use of 35mm Ansco Color Film for 16mm color release prints," Jour. SMPE, 53: 143-148, Aug. 1949.
2. Herman H. Duerr, "The Ansco Color Negative-Positive Process for motion pictures," Jour. SMPTE, 58: 465-479, June 1952.
3. Data furnished in 1951 by Robert F. Burns, Laboratory Manager, The Houston Color Film Laboratories, Inc., Burbank, Calif.
Reid H. Ray: Color in Production
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