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Cleaning Motion Picture Positive Film — Faulkner 121
I will repeat that the hopes of ultimately having available a satisfactory plant for cleaning film has been the goal toward which I have been striving for years. During these years of what you might classify as research there have been many machines considered and tested, many wash solutions analyzed, and every system with which we could come in contact investigated. Many of them have merit, and almost all of them offer in some manner a remedy for dirty film. In most instances, the plants that were investigated were operated by their owners as cleaning plants, and their business was confined to cleaning film and not to selling equipment for film cleaning. In such cases it meant the loss of time to transport film to and from our plant to theirs. This research work included a very careful study of various types of machines which were on the market and recommended for exchange use but which we found after a very careful analysis did not accomplish the result we desired.
In analyzing a machine, it is necessary to take into consideration the following pertinent factors:
First, in developing capacity, you must bear in mind the greater the speed of operation, the greater the possibilities of film damage. We have minimized damage by using large aluminum rollers with wide flanges to guide the film and by the elimination of sprockets. A gravity switch controls the motor so that, should the film break, the machine is stopped immediately. There are no buffs or fast rotating pohshers to heat the film should it become stationary, and there are no sprocket teeth to injure it, or idler rollers to crease or mark it.
To summarize: We are now cleaning film, regardless of the amount of oil and dirt that there is on it at the rate of a one thousand foot reel in practically five minutes. Every inch of the one thousand foot reel is entirely free from all oil and dirt ; there has been no strain on the perforations in any manner; both sides of the film are polished; and this without shrinkage or damage to the tinting.
We may safely claim that film which has received such treatment is so smoothly polished on either side that, besides being clean and transparent, it is able to pass through the projector with the least possible friction and damage to itself.
DISCUSSION
De. Hickman: The point that interested me was not the mechanical apparatus but the cleaning fluid, the composition of