Journal of the Society of Motion Picture Engineers (1930-1949)

(5) Omit appendix. (6) Add a new note reading "Experience shows that it is common for film to expand when exposed to high relative humidity. Allowance should be made for this factor in equipment design and in no case should the equipment design fail to accommodate film width of 0.630 inch, 16.00 mm." A specification for film thickness discussed by the working group but no agreement was reached. The matter was left for further discussion and study. Definition of Safety Film It was initially agreed that an international standard for the definition, test and identification of safety film should be established. One of the U.S.A. delegates believed it would be desirable that any ISO standard for 32mm, 16mm and 8mm motion picture film should stipulate the use of a safety base only. The proposal appeared to raise national statutory and legal questions which would call for investigation and consideration. The working group noted that the research which had been conducted in the United Kingdom had established a simple form of test which might replace the more elaborate laboratory tests of the current American Standard Definition for Motion Picture Safety Film, Z22.31-1946. A demonstration of the apparatus was given and the members thought the United Kingdom test worthy of study. The United Kingdom undertook to prepare and circulate working drawings and particulars to enable each country to make its own apparatus and carry out confirmatory tests. France and Germany, however, desired the earliest possible establishment of an international standard and suggested that the current American Standard, which was virtually a reproduction of the ISA proposal of 1936, should be considered for adoption by the ISO for a three-year period. While not seeing any urgent need for this, the United States representatives said they would not wish to oppose the adoption of this course. The United Kingdom delegates had no power to commit their country but only to express the view that the 1936 ISA proposal was too elaborate, was out-of-date and the time was ripe for a new specification to be formulated. It was understood that the ISO was willing to circulate ISA proposals and recommendations which could be used nationally pending the agreement on an international standard. Agreement was finally reached that the Definition for Motion Picture Safety Film, Z22.31-1946, be submitted to ISO/TC36 for letter ballot action. Emulsion and Sound Record Positions in Cameras and Projectors The working group agreed to recommend to ISO/TC36 that the secretariat prepare a Draft ISO Proposal incorporating the technical content of the American Standards listed below with the modifications indicated: Emulsion and Sound Record Positions in Camera for 35mm Sound Motion Picture Film, Z22.2-1946, Emulsion and Sound Record Positions in Projector for 35mm Sound Motion Picture Film, Z22.3-1946, Delete paragraphs 2 and 3, reference to guided edge and footnote. Add identification of sound record (shaded area). Emulsion Position in Camera for 16mm Silent Motion Picture Film, Z22.9 1946, Emulsion Position in Projector for Direct Front Projection of 16mm Silent Motion Picture Film, Z22. 10-1 947, Emulsion Position in Camera for 8mm Silent Motion Picture Film, Z22.21 1946, Emulsion Position in Projector for Direct Front Projection of 8mm Silent Bowditch and Kogel: International Standardization 353