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Aug., 1945 THE PROJECTION LIFE OF FILM 101
aged due to splicing. Befpre making the picture demonstrating results of bad splicing, I gathered film scraps from some 35 exchanges throughout the United States, and analyzed and catalogued each particular type of damage due to improper splicing. The result of this analysis was the slow-motion film mentioned.
The point I am trying to make is this: I believe that in order to overcome excessive edge damage to film, or any other type of damage, it is necessary to visit a sufficient number of exchanges throughout the country, gather samples of film damage, analyze and catalogue them. Any particular type of damage to film can quickly be catalogued by an expert and only then can proper steps be taken to correct this evil. In my opinion, testing or analyzing film damage cannot be satisfactorily arrived at in a laboratory. The life of motion picture film has been greatly increased in the past years due to intelligent investigation and analysis of causes. There is still considerable research to be done to bring about the maximum life of positive prints and most of these causes will be found in the field, mainly in the film exchanges.
With the advent of sound it was necessary to keep projector heads in a much better mechanical condition than in the silent days. There have been many attempts to correct sprocket pitch, take-up tension, use of bad reels, etc., all of which are contributing factors to various types of film damage.
Positive film is handled only in exchanges and theaters, consequently it is my belief that a thorough survey of these 2 branches of the industry should result in the establishment of the necessary standards for the proper handling of film.
First, the investigation should be made in the exchanges where, it will be found, a great deal of the damage to film occurs. There should be designed a good rewind and a blueprint for the installation of these rewinds. Also it is considered practical to install between the rewinds a guide for keeping the convolutions of the roll of film smooth in its travel from the free-running reel to the rewinding reel. Good reels should always be used in connection with the inspection and rewinding of film in exchanges. All devices used in the exchange in connection with inspection and handling of film should be engineered into the general setup.
In the past there has been a number of treatments for positive film tested. Some were found beneficial, others showed no improvement in the life of the film. Today it is definitely known that there are certain treatments for positive film that actually retards scratching, keeps the film pliable, retards oil absorption, and, in general, while not necessarily prolonging the life of the film by such a treatment, will keep the film in a new condition for a longer period of time.
It is this speaker's thought that it would not be amiss to appoint a committee of experts to make a thorough survey on the care and handling of film.
MR. GRIFFIN: I hope the Editorial Board will find it possible to promptly publish this paper. It will be most interesting to all projection manufacturers including my own company. Thank you, Mr. Talbot.