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TYPES OF FILM DAMAGE Damage Causes Remedy a. Dirty rollers, gate, film channel. b. Cinching film on reel c. Letting loose film fall on floor a. Stepping on film b. Pinching film in closing film can a. Too much tension on gate or take-up reel b. Jerking movement of take-up reel c. Shuttle worn or out of ad- justment d. Worn sprockets f. Loss of loops a. Too much tension on gate or take-up reel Jerking movement of take-up reel c. Worn shuttle or sprockets d. Dry film; loss of loops Faulty film splice . Sudden jerk on take-up reel Film improperly placed in film channel Failure to allow loops a. Running a sound film on silent type projector b. Incorrect threading (sound track and sprocket track reversed) c. Film failing to engage sprocket teeth a. Faulty or sticking fire shutter b. Projector running too slow- without fire shutter in place a. Improper or careless stor- age b. Dirty projector c. Improper handling of film From Projectionists Handbook published and copyrighted by Business Screen Magazine, Clean projector, handle film carefully Handle film carefully Have projector attended to by approved repairman Rethread Have projector attended to by approved repairman Humidify; rethread film Make correct splice; re- thread machine Use appropriate equipment for type of film Make sure film is on reel properly Rethread and check Have projector checked by approved repairman Clean projector, clean film, wipe with soft clean cloth and carbon tetrachloride Handle film carefully 251