Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 6, June 1932)

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Variation of Photographic Sensitivity with Development Time

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: The relation between photographic sensitivity and the time of development has been studied. Three modifications of Hurter and Driffield's method of measuring plate speeds have been used as indexes of sensitivity. The results are generally in accord with those of Bullock, who investigated the relation of “threshold speed” to development time. An optimum time of development is indicated, which varies with the type of emulsion. The differences between the three indexes have been brought out. Just which index is most satisfactory depends somewhat on the nature of the individual problem. It is concluded that, in many cases, a single value of any index is inadequate to represent the sensitivity of a given emulsion. The clearest representation may be had by a curve plotted between a sensitivity index and development time.
Publication Date: 1932-06-01
DOI: 10.5594/J05510
Link: https://doi.org/10.5594/J05510
Author(s): Raymond Davis, Gerald K. Neeland

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Raymond Davis and Gerald K. Neeland; Variation of Photographic Sensitivity with Development Time, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 6, June 1932); SMPTE, 1932. Available at https://doi.org/10.5594/J05510

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Raymond Davis and Gerald K. Neeland; Variation of Photographic Sensitivity with Development Time, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 6, June 1932); SMPTE, 1932. Available at https://doi.org/10.5594/J05510

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<span class="citation">Raymond Davis and Gerald K. Neeland; <cite>Variation of Photographic Sensitivity with Development Time</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 6, June 1932); SMPTE, 1932. Available at <a href="https://doi.org/10.5594/J05510" target="_blank" rel="noopener">https://doi.org/10.5594/J05510</a></span>

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<li>
Raymond Davis and Gerald K. Neeland; <cite id="bib-10-5594-j05510">Variation of Photographic Sensitivity with Development Time</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 6, June 1932); SMPTE, 1932
<span class="doi">10.5594/J05510</span>
</li>