How to use talking pictures in business (1938)

Page scan 000238 from How to use talking pictures in business

Record Details:

Title:
How to use talking pictures in business
Date:
1938
Author:
Metcalfe, Lyne Shackleford, 1886-
Publisher:
New York, London, Harper & brothers
Volume:
How to use talking pictures in business
Leaf #:
000238
Language:
English
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Date Added:
July 20, 2022
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PROJECTORS AND PROJECTION 209 15 minutes when silent or 11 minutes with sound. All commercial pictures are printed on 35mm safety film stock. Safety 35mm film costs % cent per foot more than nitrate (inflammable) film. Nitrate film is used where pictures are intended for showings in theaters only. Film of 16mm width is non-inflammable, supplied only on a cellulose-acetate base—approved by fire underwriters as safe for use and handling anywhere and at any time. With it there are no risks and no restrictions. Fireproof booths are not required. All 16mm film is approximately 3/5 of an inch in width, has 40 pictures or frames to a foot (two and one-half times as many as 35mm film). Standard reel is 400 feet and takes 15 minutes silent and 11 minutes with sound for showing —equivalent in picture value to 1,000 feet of 35mm film. Reel size (400 feet) : diam- eter, 7 inches; thickness, % inch; weight 1 pound. Contrast this with the 10-inch, 6-pound 35mm reel. It is important that film be kept in condition. When left in the open it becomes dry and brittle; but it quickly absorbs moisture in a humidor, and may in this way be kept pliable, giving service for years. Dirty film may be cleaned, renovated, and restored to a usable condition at reasonable cost by a company specializing in such work. There is also a film preser- vation process which consists of surfacing the film with a special wax substance said to minimize scratching.