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336 X. EDITING AND ASSEMBLY
the copy is not only in color but is printed on color reversal duplicating (duping) stock that provides the correct direction of the picture tonal scale with respect to highlights and shadows. In this print, the density will be correct only for a scene in the original that is correctly exposed ; all other scenes will deviate from correct exposure to a greater degree than they did in the assembled original. This class of print is sold both by film manufacturers' laboratories and by commercial laboratories. In general, the film manufacturers' laboratories color-develop all such film because commercial laboratories do not ordinarily operate color film developing machines. The price of this class of print and its quality depends upon where you buy it (a common price is about 12^ per foot). Within the years to come, it is likely that manufacturers will encourage color-film processing by commercial laboratories to an extended degree. At present, however, such processing accounts for a small percentage of the total color film volume.
Generally speaking, work prints are not timed to correct for exposure variations of the original ; ordinarily, timing involves notching the original. Such notching is customarily avoided until the original is edited and ready for release printing.
At this point it is evident that motion pictures are not cheap. It is also evident that there is a significant price difference between a one-light work print on positive stock that was developed in a positive bath and a one-light color dupe work print. (For a one-reel picture, shot 5 to 1, the difference is about $200.) This is usually a big hurdle for the prospective film user because he would like to have the price of the former with the convenience of the latter. A warning should be given at this point: it doesn't pay to cut corners here.
Shipping the Original to Film Manufacturer for Developing
It is apparent from the foregoing that preparations and decisions must be made before the exposed original film is placed in the shipping package for dispatch for developing. The film manufacturer's developing plant is usually very well run. The film manufacturer has learned the importance of utter cleanliness in his manufacturing operations and carries over his experience very deliberately in his 16-mm processing. Variations occur here from time to time and from plant to plant ; as in all commercial manufacture, the usual variations characteristic of a manufacturing process are just as evident to a keen observer of film handling as they are in any other manufacturing process. If you