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WINDING

When a 16 mm roll of raw stock, perforated along one edge, is held so that the end of the film leaves the roll at the top and to the right, it is designated Winding A if the perforations are toward the observer, Winding B if the perforations are away from the observer, as shown in Figure 42. Winding A films are used to make contact prints and are not intended for use in the camera. Winding B is used for camera film, to make optical prints, and on bidirectional printers.

NOTE: When requesting single-perforated film on a spool or core that has nonsymmetrical flanges (i.e., a different hole or keyway on either side), you must indicate the hole or keyway closest to the perforations and specify whether the emulsion should be wound in or out.



Figure 42
Winding A
Emulsion Side in
Winding B
Emulsion Side in

Film for use in 16 mm single-system sound cameras is regularly furnished in Winding B on 100-foot (30.5 m) and 200-foot (61 m) spools. It is also furnished in Winding B on 400-foot (122 m) Type T cores and, occasionally, on spools.




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