Practical cinematography and its applications (1913)

Record Details:

Title:
Practical cinematography and its applications
Date:
1913
Publisher:
Philadelphia, Lippincott
Volume:
Practical cinematography and its applications
Leaf #:
000103
Language:
English
Collection:
Books
Format:
Books
Contributor:
Gerstein - University of Toronto
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
14
Date Added:
July 19, 2022
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68 PRACTICAL CINEMATOGRAPHY unwound and passed round the pin on one diagonal, then to the relative pins on the three other members. It is then taken round the second pin on the first diagonal, followed round the relative pins on the other three members, and so on until the whole film has been uncoiled, the pins on the other four cross members being called into requisition as additional supports when the frame is about half covered. When the film is mounted upon this frame it is in the form of an endless square spiral. When the frame is laid in the bath of solution the film stands edgewise. The wooden frame, however, is now almost exclusively used, as it is easier and simpler to work. The film can be transferred to it in a shorter space of time, and the frame with the film upon it can be handled more safely. The ruby light may be either electricity, gas, or oil, but extreme care must be taken to make absolutely certain that the light is non-actinic, and is not too powerful, otherwise the film, which is extremely sensitive, will be fogged during development. The safety of the light may be tested in a very simple and easy manner. Cut off about 6 inches of film from the unexposed reel, lay it flat upon the developing bench, emul- sion side uppermost, in full view of the ruby light. Place two or three coins upon the emulsion and leave them there for a few minutes. Then