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Brian R Pritchard Motion Picture and Film Archive Consultant
COLOUR FILMS WITH UNUSUAL SENSITIVITIES
There have been a number colour films made where the colour image produced on the film does not follow the usual correlation of the colour of the exposing light to the dyes produced. For the fairly obvious reason that the whole point of photographing in colour is to get correct colour reproduction, they were usually colour print or duplicating films where the correlation did not affect the final result.
The order of the layers was changed so that the magenta layer was on top because it is the sharpest layer. 'Eastman' Color Print film has the magenta layer on top although it has the normal relationship of sensitivity/dye of blue/yellow, green/magenta and red/cyan.
Three types of Eastman Colour Film are manufactured. These are the Colour Negative Film, intended for use as the picture negative material in the camera; the Colour lnternegative Film, used for a similar purpose to black-and-white duplicating negative film; and Colour Print Film, which may be employed in preparing prints from either the Colour Negative or Colour lnternegative.
Each film magazine would typically yield 160 color and 200 black and white pictures on special film. Kodak was asked by NASA to develop thin new films with special emulsions. On Apollo 8, three magazines were loaded with 70 mm wide, perforated Kodak Panatomic-X fine-grained, 80 ASA, b/w film, two with Kodak Ektachrome SO-168, one with Kodak Ektachrome SO-121, and one with super light-sensitive Kodak 2485, 16,000 ASA film. There were 1100 color, black and white, and filtered photographs returned from the Apollo 8 mission.
Three types of Eastman Colour Film are manufactured. These are the Colour Negative Film, intended for use as the picture negative material in the camera; the Colour lnternegative Film, used for a similar purpose to black-and-white duplicating negative film; and Colour Print Film, which may be employed in preparing prints from either the Colour Negative or Colour lnternegative.