Abstract
THE advent of gelatin plates has almost driven collodion out of the photographic world. The wet collodion process has all along retained its position in some kinds of photo-mechanical work, but collodion emulsions seemed to have no place left for them until a few years ago their advantages for certain technical purposes were insisted on, and the publishers and author of this volume did a good deal towards re-introducing them into this country on a commercial basis. As collodion emulsion can now be purchased the author has very little to say about the preparation of it; he only quotes two or three formulæ from other workers. The volume must be regarded as a guide to the practical user of commercial emulsions. Their applications in the making of ferrotypes, lantern slides, opals, and transparencies, and for photographing on wood are concisely described; but the principal part of the work, and by far the most important, deals with the colour sensitising of emulsions, and the applications of such sensitised emulsions to the production of negatives in the many methods of dealing with and reproducing colour that are now in vogue.
Collodion Emulsion.
By Henry Oscar Klein. Pp. 95. (London: Penrose and Co., 1905.) Price 5s. net.
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Collodion Emulsion . Nature 74, 5–6 (1906). https://doi.org/10.1038/074005b0
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DOI: https://doi.org/10.1038/074005b0
