Movie Makers (Jan-Dec 1930)

: .-m. K. E R s HOME DEVELOPING AND PRINTING (Continued from page 25) Drying. After the washing has been concluded the film should be carefully dried. The process of drying should not be unduly hastened, nor should it be extended beyond reasonable limits. The rate of drying has a very definite effect upon the appearance of the emulsion. A film which has been unevenly dried will show a distinct lack of uniformity in density. Film should therefore be dried in from one-half to threequarters of an hour and upon a rotating rack or drum so that the drying effect will be uniform throughout and so that all parts of the film will dry simultaneously. A film handled in this manner will exhibit to the best possible degree all of the characteristics produced in the course of development. When the film is mounted upon the rack or drum for drying, it is essential that the ends be attached by some kind of elastic connection so that shrinkage in the course of drying will not cause any mutilation. Drying should be carried on in a room as nearly dust-free as possible, since dust particles which stick to the wet emulsion have a tendency to become embedded when the film dries. Polishing. Washing does not end the processing of the film. No matter how clean the water used for washing, there will always be a certain amount of insoluble matter held in suspension in the water. This suspended matter is deposited upon the film and, as the final drying is in the form of a constantly shrinking spot of water, the deposited matter is left in more or less irregular spots of grey scum. Of course, it is necessary that these be removed from the film as they present a most distressing appearance when the film is projected. One of the best methods for removing these marks and for thoroughly cleaning the film is to pass it between compressed pads of absorbent material such as a fine-grade, silk velvet saturated with carbon tetrachloride. This compound is also available under various trade names. Of ZEISS CINE LENSES lead the ivorld ^ BIOTAR F1.4, TESSAR F2.7 and F3.5, TELE-TESSAR F6.3 ■ FINDERS ■ FILTERS ■ SUN-SHADES ■ FOR STANDARD and 16 MM MOVIE CAMERAS CARL ZEISS, INC., 485 FIFTH AVE., NEW YORK. 728 SO. HILL ST., LOS ANGELES BRITE LITE In Transcontinental Air Transport Plane GLASS BEADED MOVIE SCREEN Model A $15.00 30 X 40 INCHES AFTER exhaustive competitive tests Brite-Lite Glass Beaded Movie Screen was chosen for use on the first transcontinental air ship to show 16mm. motion pictures while flying in daylight. Motion pictures were shown on board one of the Transcontinental Air Transport ships on its trip from Port Columbus. Ohio, to Los Angeles and return. Three shows a day were given during the flight, at heights varying from 10,000 to 13,000 feet, with the plane traveling at an average speed of 125 miles an hour. On this tnp Brite-Lite Movie Screen proved its superiority as a medium for projecting 16mm. movies; its marvelous reflecting powers. Third Dimension qualities, and brilliancy made the test a success in every way. Brite-Lite Screens have great reflective powers without causing eyestrain. Brite-Lite Screens give depth, stereoscopic effect and realism to the picture. Brite-Lite Screens are automatic, collapsible and light in weight. Made in box or roller type models, priced from $7.50 and up. Can be obtained from your dealer, or direct from us. Write for interesting literature. For Perfection in Projection use brite lite BEADED SCREEN CORP. ROOSEVELT, L. L, NEW YORK 45