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 — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPE
Volume: 18, No. 6, pp. 742–751
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
ISSN: Print: 0097-5834
Link: https://doi.org/10.5594/J05510
Author(s): Raymond DavisU. S. Bureau of Standards, Department of Commerce, Washington, D. C.
Gerald K. NeelandU. S. Bureau of Standards, Department of Commerce, Washington, D. C.
Copyright: © 1932 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1 Bullock E. R. : “On Variations in Threshold Speed according to the Development and Conditions of Development,” Communication No. 268, Parts I and Ii, Abridged Scientific Publications , Research Laboratories, Eastman Kodak Company ( 1926 ), p. 144 . EXTERNAL
2 Davis Raymond Gibson K. S. : “Filters for the Reproduction of Sunlight and Daylight and the Determination of Color Temperature,” Bureau of Standards , Mis. Pub. , No. 114. EXTERNAL
3 Jones L. A. Russell M. E. : “The Expression of Plate Speed in Terms of Minimum Useful Gradient,” Proc. 7th International Congress of Photography ( 1928 ), p. 130 . EXTERNAL
4 Davis Raymond Neeland G. K. : “A Note on the Speed of Photographic Emulsions,” J. Opt. Soc. of America , 21 (July, 1931 ), No. 7 , p. 416 . EXTERNAL

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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>
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