Die wichtigsten Verfahren der Farbenphotographie

Summary

In the early days of photography daguerrotypes were stained with specific pigments (Isenring).Lippmann's “interference procedure”, working with the pure colours of the spectrum is of great interest theoretically, but cannot be used practically. Only after the division of the visible spectrum into 3 regions: 400–500 mµ (blue), 500–600 mµ (green) and 600–700 mµ (red) and the discovery of sensitizers byVogel did the modern colour photography become possible for practical purposes.Ducos du Hauron recommended several different ways for colour photography based on that principle and even followed some of them up by himself; however, only a few have proved valuable. The method of microscopic-coloured mosaic filters and the lenticular film method work with an additive process. For coloured prints in books and journals one first produces separate exposures from the original by the aid of filters that are transparent in the before-mentioned regions of the spectrum. By means of these separate negatives the print is produced with printing stains that are complementary to the filter stains, i.e. yellow, magenta and cyan. The Technicolor-method now widely used in cinematography works under similar conditions. Beside that only the method of colour development in different varieties and ways of application is in use today.