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Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 1, January 1931)
[ACTIVE]

Double Toning of Motion Picture Films

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
A motion picture image with green shadows and blue halftones can be prepared by toning the image blue in the usual toning solution, fixing in hypo, washing, and then re-toning followed by immersion in a solution of a basic dye. In this way the first toning bath converts the silver image to a mixture of Prussian blue and silver ferrocyanide, the reaction going to completion in the halftones but incompletely in the shadows so that some of the silver is unaffected. The silver ferrocyanide is removed in the hypo solution leaving an image consisting of pure Prussian blue in the halftones and a mixture of this substance and silver in the shadows. On re-immersion in the blue toning bath, the silver in the shadows is again converted to a mixture of Prussian blue and silver ferrocyanide which latter substance is a mordant for basic dyes, so that on immersion in a dye solution the dye is absorbed only to the shadows
Publication Date
1931-01-01
DOI
10.5594/J16628
Link
https://doi.org/10.5594/J16628
Author(s)
J. I. Crabtree, W. Marsh
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J16628.json

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J. I. Crabtree and W. Marsh; Double Toning of Motion Picture Films, Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 1, January 1931); SMPTE, 1931. Available at https://doi.org/10.5594/J16628
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J. I. Crabtree and W. Marsh; Double Toning of Motion Picture Films, Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 1, January 1931); SMPTE, 1931. Available at https://doi.org/10.5594/J16628

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J. I. Crabtree and W. Marsh; Double Toning of Motion Picture Films, Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 1, January 1931); SMPTE, 1931. Available at https://doi.org/10.5594/J16628
Snippet:
<span class="citation">J. I. Crabtree and W. Marsh; <cite>Double Toning of Motion Picture Films</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 1, January 1931); SMPTE, 1931. Available at <a href="https://doi.org/10.5594/J16628" target="_blank" rel="noopener">https://doi.org/10.5594/J16628</a></span>

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Preview:
J. I. Crabtree and W. Marsh; Double Toning of Motion Picture Films, Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 1, January 1931); SMPTE, 1931
doi: 10.5594/J16628
url: https://doi.org/10.5594/J16628
Snippet:
<li>
J. I. Crabtree and W. Marsh; <cite id="bib-10-5594-j16628">Double Toning of Motion Picture Films</cite>, Journal of the Society of Motion Picture Engineers ( Volume: 16, Issue: 1, January 1931); SMPTE, 1931
<span class="doi">10.5594/J16628</span>
</li>