This section is from the book "Complete Self-Instructing Library Of Practical Photography", by J. B. Schriever. Also available from Amazon: Complete Self-Instructing Library Of Practical Photography.
Removing Films From Film Pack. Take the camera or adapter to the dark-room, remove the pack and break the red seal at the sides, near the bottom, which will open the pack, thus giving access to the exposed films. After removing the exposed films, the pack can be replaced, without sealing, in the camera or adapter before leaving the dark-room, when everything is ready for additional exposures. The films are attached to black paper supports at one end and they may be readily separated, but care should be exercised when separating the paper, for tearing them apart quickly will, by the friction, cause electric sparks which will generally fog the film. One may develop the films singly if desired. The paper supports are numbered to correspond with the tabs, so that by noting a given exposure, at the time of making it, proper treatment may be given this particular film.
THE AFTER GLOW Study No. 5 - See Page 370 By H. H. Boyce.
Developing Film Pack Negatives. Throughout the process of development, etc., care should be taken not to touch the face of the film. After the film is placed in the developer, the tray should be kept constantly in motion until the desired density is obtained. This film should be placed in all the solutions face downward.
224. The development of the films used in the film pack is identical with that of the cut films, or of the dry plate, with the exception that the latter is developed face up. For developing we recommend the prepared powders referred to in the Film Instruction.
225. If a number of films are to be fixed together in one tray, they should be put in one at a time, face down, to avoid scratching, and they should be handled over occasionally to avoid matting together and insure thorough fixing. After fixing, wash thoroughly before drying. Use the regular Hypo Acid Fixing Bath.
226. To dry, pin the film up by one corner to the edge of a shelf or similar projection, being sure that it swings clear of the wall in order that nothing may come in contact with either side until thoroughly dry.