re. The second bleaching bath now removes the green and blue dyes where there is no protective cover of ink. In the final bath these clear spaces are dyed red, and lastly the ink lines are removed. The reason for making the red lines narrower is to equalise approximately the areas of red, blue and… … FIG 1 CROSS 5ECTION THROUGH PIECE OF DUFAYCOLOR. FILM The film is exposed through the base so that the light passes through the colour reseau before reaching the emulsion.
Color photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
