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REPORT OF THE COMMITTEE ON FILMS AND EMULSIONS
THE board of Governors on December 9th, 1921, submitted to this Committee several items upon which they desired us to
investigate and report.
The investigations called for are :
First: Report on inflammable and non-inflammable film stock.
Second: Methods of preparing and cutting film.
Third: Possibility of standardizing the printing of motion picture film.
Fourth: Effect of different wave lengths of light on various emulsions.
Fifth: Storage and preservation of negative.
Sixth: Investigations of different color processes.
In some respects this line of work would require an appropriation and the establishment of a research laboratory. That, of course, is not possible at this time and we are, therefore, dependent upon manufacturing companies in this field to voluntarily make the investigations. If the particular firms are interested in these subjects they will, of course, permit their experts to spend the requisite time and money. It seems, however, that the best we can hope to do, for the moment, is simply gather together available data and collate it as it is distributed.
Inflammable and Non-inflammable Film Stock
The inflammable stock is usually spoken of as nitrate base, while the non-inflammable stock is usually spoken of as acetate base.
Cost: Present cost to consumers of positive film of domestic manufacture, 1 3/8" wide, having a cellulose nitrate base, is 2J^c per foot, unperforated.
Acetate cellulose positive of domestic manufacture, 1 3/8" wide, is 3c net per foot, unperforated.
Acetate cellulose positive of domestic manufacture, 1 1/10" wide, is 2J^ Q per foot, perforated (Eastman perforation).
Durability : Under similar conditions of use, acetate positive film has approximately 85-90%, the physical properties of the nitrate base being positive.
Shrinkage : At the time of printing, the wetting of the two bases shows that the acetate base shrinks or expands more readily than the nitrate, but in practice this has not caused any difficulty in the handling of the material.
Ability to take Dyes: In practice the base is very seldom dyed. It is assumed that the Board here intended to refer to the emulsion. The emulsion on either stock is the same and its ability to be handled for color work is the same in either case.
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