Abstract
THE scope of this volume is much more limited than the title might be supposed to indicate. The author deals with the theories of light and colour so far as concerns the subject, and in a thoroughly practical way with the sensitising of plates, the making and choice of colour filters, and. the choice of inks, but the actual printing processes themselves are barely mentioned. Screen-plate processes, such as the use of autochrome and similar plates, are not dealt with. We have therefore a treatise on the fundamentals of three-colour photography. We must first express our disappointments. At page 95 there are eight absorption spectra, showing the effect of each dye in two concentrations, but we cannot find any indication as to the dyes to which these spectra refer. There are references to “Supplement IV.,” a coloured plate which should contain some most interesting results, but the plate is not anywhere to be found. At page 80 we are told that “for accurate work it is necessary to measure the densities with the aid of Marten's polarisation photometer,” as if this were the only instrument suitable for this purpose, or the only accurate photometer applicable. Of course, there are many forms of photometer available, and not everyone would prefer the Marten instrument.
Three-Colour Photography: with Special Reference to Three-Colour Printing and Similar Processes.
By Arthur Freiherrn von Hübl. Translated by H. O. Klein. Pp. 138. (London: Percy Lund, Humphries and Co., Ltd., 1915.) Price 7s. 6d.
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J., C. Three-Colour Photography: with Special Reference to Three-Colour Printing and Similar Processes . Nature 95, 641 (1915). https://doi.org/10.1038/095641a0
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DOI: https://doi.org/10.1038/095641a0