Comparison Test Between Dufaycolor And Kodachrome.
Conducted by Albert K. Wittmer, Kodak Research Laboratories, Rochester, NY, 1939, comprising a two page typewritten report and two pages with three pairs of mounted 3¼ x 4¼ in.transparencies of a young woman posing outdoors, one of the pairs of images taken on Kodachrome the other taken on Dufaycolor Film Pack. With two unmounted pairs of 2¼ x 3¼ in. of Kodachrome and Dufaycolor transparencies of two different poses of a young aviatrix and a fighter plane, and two other similar Kodachrome transparencies.
The results of the test were that Dufaycolor is about 25% slower, and lacks the color saturation of Kodachrome.