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July, 1929
The Motion Picture Projectionist
37
Procedure for Removing Oil and Dirt from Film
IF for any reason a surplus of oil accumulates on the projector it is quite likely that some will fall on the film, and tend to hold any dust or dirt that may come in contact with it. This oil and dirt may deposit around sprockets, in the idlers, in the film track, and at the aperture opening, and may interfere with perfect projection or damage the film itself. There are several simple film cleaners on the market that may be bought at small cost.
In the absence of a film cleaner, a soft lintless cloth held in contact with both surfaces of the film will serve very acceptably. It is quite important to use clean cloths frequently as old ones become soiled. If soiled cloths are used there is a likelihood that rain streaks will be produced. A stiff-bristled tooth brush may be used to remove dirt from the parts of the projector.
New film is said to be "green." In order that it will pass through the projector satisfactorily, the film must be waxed. When a new film is projected, if it is not waxed, an accumulation gathers on the tension shoes immediately in front of the aperture, and on other surfaces. This substance becomes very hard and difficult to remove. It may be removed by using alcohol as a solvent, or scraping the accumulation away with a coin. Never use a knife because steel will scratch the surfaces. Dirt deposits, scratches, and dirt all tend to injure the film. The photographic quality may not be injured but the film surrounding the sprocket holes may be scratched quite badly.
Causes of Bad Film
The following contribute to rapid film deterioration and subsequent projection difficulties : Dirt accumulations. Worn sprocket teeth. Too strong tension. Poorly adjusted idlers. Misalignment of working parts. Surplus of oil and grit. Accumulation of loose emulsion and wax. Careless rewinding, packing, shipping and
storing.
Fox "Widescope" to Be Ready for Fall Showing
The Fox Film Corp. is pushing work on its new wide film process and it is understood that the first public showing of Widescope will be given early in September. Special projectors for use with Widescope have been built by the International Projector Corp., which company is understood to have cooperated with Fox in the development of the process.
Widescope is the third entry in the wide film derby, both RCA and Paramount having already demonstrated their processes— the SpoorBerggren and Magnafilm systems, respectively. A race to be the first to offer a complete wide film program at a Broadway house is now in progress between these companies.
Mellaphone Speedometers
A Necessity for Proper Sound Projection
$20.00 Each, Complete with Mounting Bracket. A Precision Instrument of the Finest Quality.
Special Discount to Projectionists
MELLAPHONE CORP.
P. O. Box 485
Rochester, N. Y.
DEPENDABLE ACCESSORIES
1. Speed Indicator Control Panel
2. Anti Vibration Support Brackets
3. Micrometer Focussing Device
4. Illuminated Eye Shields, complete with Asbestos cooling plate
5. Arcoscope
6. Heavy Duty Drive Belt
7. Spring Speed Control Generator Belt
8. Adjustable Tilting Device
9. Pedestal Drip Pan
10. Carbon Cabinet
CO., Inc.
Brooklyn, N. Y.
BLUE SEAL PRODUCTS
262 Wyckoff Street
Manufacturers of Motion Picture Accessories Since 1913