Konig, E., writer on photography, Wall, E. J. (Edward John), 1860-1928 · London : Hazell, Watson & Viney · leaf 21
Introduction 15 length 520; and B, blue light of wave-length 400. Then the light reflected from the mercury passes through, the … Munich. Fig. 1. III. The Bleaching-out Process This interesting process is based on the fact that unstable dyes are destroyed or bleached only by those rays of light which they absorb. Thus, an unstable red dye will be stable in red light, but will bleach out in any other colored light. This…
Color photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-334-186.webp)
