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Aug., 1936] COMMITTEE ON PRESERVATION OF FILM 153
can should be made. The Bureau of Standards had previously recommended that only acid-resisting material should be used, with a possible choice between stainless steel and aluminum. Although aluminum is resistant to oxides of nitrogen, its tendency to flake and dust and its susceptibility to abrasions mitigate against its use for storage of motion picture film. The Committee concluded, therefore, that if aluminum were used the film should be enclosed in black photographic paper. Its preference, however, was for stainless steel, Pyrex glass, or some acid-resisting material other than aluminum.
ACETATE NEGATIVE
The question of the use of acetate negatives was given consideration by the Committee. The National Archives is interested in this as a basis for determining future policy in its choice between use of nitrate negatives or acetate. In view of the seeming stability of acetate film, its use for future duplications of archives seems advisable. The question was asked, "Can the film manufacturers furnish acetate base for duplicating negatives?" It was the thought of the Committee that reasonable assurance can be given at this time for a practical acetate negative for use under controlled conditions set up by The National Archives. Its greatest weakness is its tendency to buckle and distort, which would necessitate special handling. The representatives of the film manufacturing companies promised to give further thought to a pre-shrunk base.
MISCELLANEOUS
The Committee recommended, in addition to the work being done at the Bureau, (a) that the phrase "preservation of film" be defined to include "preservation of film records" by all possible means, including duplication; (b) that caution be taken in removing all possible dust from the film before handling, rewinding, etc.; (c) that further thought be given to renovation and salvaging of old motion picture film, restoration of faded images, etc.; (d) that careful chemical tests be made for injurious foreign matter before accepting film for storage and (e) specifications for processing and handling new film; (/) optical printers for shrunken film, (g) filing aids, storage of safety film, etc.
The Committee extended its thanks to the National Bureau of Standards for its helpful contributions in the field of film preservation and for its fine spirit of cooperation with the Committee.