Transactions of the Society of Motion Picture Engineers ( Volume: 8, Issue: 18, May 1924)

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Effect of Humidity upon Photographic Speed

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: orig-research
Abstract: WHILE it has been known for many years that the sensitiveness of photographic materials falls when the gelatin is allowed to absorb moisture by exposure to humid air and for a few special purposes, such as in astronomical work, precautions have been taken to avoid this effect, it is probably not too widely known among users of cine films that the effect is large enough to be of practical importance under adverse conditions. It was, therefore, thought worth while to present to you some quantitative data obtained in the Redpath Laboratory of E. I. duPont deNemours & Co. showing the magnitude of the effect observed with a variety of materials, more especially since our observations show that the phenomenon is a very complex one. In all cases, the results given are the averages of a number of careful independent determinations and it should be stated that equilibrium was not considered to have been attained until the films had been exposed to the various atmospheres for at least 24 hours.
Publication Date: 1924-05-01
DOI: 10.5594/jj00041
Link: https://doi.org/10.5594/jj00041
Author(s): F. F. Renwick

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F. F. Renwick; Effect of Humidity upon Photographic Speed, Transactions of the Society of Motion Picture Engineers ( Volume: 8, Issue: 18, May 1924); SMPTE, 1924. Available at https://doi.org/10.5594/jj00041

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F. F. Renwick; Effect of Humidity upon Photographic Speed, Transactions of the Society of Motion Picture Engineers ( Volume: 8, Issue: 18, May 1924); SMPTE, 1924. Available at https://doi.org/10.5594/jj00041

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<span class="citation">F. F. Renwick; <cite>Effect of Humidity upon Photographic Speed</cite>, Transactions of the Society of Motion Picture Engineers ( Volume: 8, Issue: 18, May 1924); SMPTE, 1924. Available at <a href="https://doi.org/10.5594/jj00041" target="_blank" rel="noopener">https://doi.org/10.5594/jj00041</a></span>

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F. F. Renwick; Effect of Humidity upon Photographic Speed, Transactions of the Society of Motion Picture Engineers ( Volume: 8, Issue: 18, May 1924); SMPTE, 1924
doi: 10.5594/jj00041
url: https://doi.org/10.5594/jj00041

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F. F. Renwick; <cite id="bib-10-5594-jj00041">Effect of Humidity upon Photographic Speed</cite>, Transactions of the Society of Motion Picture Engineers ( Volume: 8, Issue: 18, May 1924); SMPTE, 1924
<span class="doi">10.5594/jj00041</span>
</li>