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Abridged Scientific Publications from the Research Laboratory of the Eastman Kodak Company Volume 4 download PDF, EPUB, Kindle
Abridged Scientific Publications from the Research Laboratory of the Eastman Kodak Company Volume 4 download PDF, EPUB, Kindle

Abridged Scientific Publications from the Research Laboratory of the Eastman Kodak Company Volume 4 by Eastman Kodak Laboratories

Abridged Scientific Publications from the Research Laboratory of the Eastman Kodak Company Volume 4
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Author: Eastman Kodak Laboratories
Number of Pages: 90 pages
Published Date: 06 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781130091403
Download Link: Abridged Scientific Publications from the Research Laboratory of the Eastman Kodak Company Volume 4
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ... optical turbidity cannot be specified in any given class of photographic work, it will always be necessary to make an experimental determination of the conditions giving maximum sharpness or resolving power. It has been the aim to show that resolving power can be put to a certain extent upon a mathematical basis, and that secondary effects can be explained in terms of four major factors, turbidity, contrast, size of grain, and graininess. Far from being the simple phenomenon imagined by Wadsworth, photographic resolving power draws upon the whole field of photographic theory and can be but imperfectly described even from the broadest viewpoint. No. 92 A PRODUCTION OF PANCHROMATIC SENSITIVENESS WITHOUT DYES BY J. G. CAPSTAFF AND E. R. BULLOCK In the course of some experimental work carried out in 1917 with ordinary plates, in which the plates were being bathed in certain solutions prior to exposure, it occasionally happened that the emulsions fogged badly on development. The cause of the fogging was puzzling, because the plates which showed the defect had apparently had the same treatment as those which developed clean. Investigation showed that the treatment undergone by the plates had rendered them panchromatic, and that their erratic behavior regarding fog was due mainly to the length of time they had been exposed to the red light of the dark room before receiving the treatment mentioned. It was finally discovered that the color-sensitizing was caused by the use of a sodium bisulphite bath followed by lengthy washing, and an effort was made to explain the effect. No entirely satisfactory hypothesis has been evolved, the most plausible being that the treatment results in a partial reduction of the silver salt to colloidal silver, which is known to act as ...

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