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Home > Iowa Academy of Science > Journals & Newsletters > Proceedings of the Iowa Academy of Science > Volume 45 (1938) > Annual Issue

 

Document Type

Research

Abstract

The effect of different fine grain photographic developers upon the effective emulsion speed and grainines of photographic materials was studied quantitively. Fine grain developers were found to be more effective in reducing the graininess of fast coarse grain emulsions than of slow fine grain emulsions. The effective emulsion speed of slow fine grain emulsions when developed in a MQ Borax developer was found to be at least equal to that of a fast coarse grain emulsion when developed in an ultra fine grain developer which gave negatives of as low graininess on the fast emulsion as the .i\IQ Borax gave on the slow emulsion. Slight improvement in graininess can be obtained by using ultra fine grain developers on fine grain emulsions, but only at some sacrifice of effective emulsion speed.

Publication Date

1938

Journal Title

Proceedings of the Iowa Academy of Science

Volume

45

Issue

1

First Page

208

Last Page

208

Copyright

©1938 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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