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Color Negative and Color Positive Film for Motion Picture Use
By W. T. HANSON, Jr.
A color film for use in an ordinary 35mm motion picture camera is described. This film contains colored couplers which, upon development to a negative, lead to three-color negative records which are almost fully corrected. The development procedures and the sensitometric characteristics are described. The spectral-density characteristics of the individual images are included. This film is printed on a color positive film. The spectral-density characteristics of the dye images obtained in the positive, the development conditions and the sensitometric characteristics of the positive are given. The printing may be done on an ordinary continuous contact printer. However, sceneto-scene color-balance changes require more complicated equipment. The sensitometric characteristics of the sound-track image and the method of developing this image are described. The color positive film may also be used for making prints from black-and-white color-separation negatives.
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NTEGRAL TRIPAGK three-color subtractive films have been in use in the motion picture industry for a good many years. These films include Monopack, Ansco Color, and 16mm Kodachrome in this country, and the Agfacolor negative-positive film in Germany. The present paper describes a new negative color film and a new positive color film for use in making 35mm motion pictures. The negative film has certain features which have not
Communication No. 1457 from the Kodak Research Laboratories, a paper presented on April 27, 1950, at the Society's Convention at Chicago, 111., by W. T. Hanson, Jr., Eastman Kodak Co., Kodak Park Works, Rochester 4, N.Y.
previously been used in the motion picture field.
The Negative Color Film. The negative film is called Eastman Color Negative Safety Film, Type 5247. It contains couplers similar to those used in the Kodacolor process described in 1942.1 Each coupler is dissolved in an oily liquid which is, in turn, dispersed in an emulsion. The structure of the film is shown in Fig. 1. It can be exposed in an ordinary 35mm motion picture camera. The ASA speed rating of the film is 16 and it is balanced for exposure in daylight or with high-intensity arcs with the Brigham Y-l filter. Being a negative film, it has somewhat more
March 1952 Journal of the SMPTE Vol. 58
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