The DUFAYCOLOR Process emulsion during exposure. Where film holders or sheaths are available, these may be used successfully, but it is important to insert first that end of the film which is attached to the backing paper so that the emulsion is adequately protected from scratches and the paper… … For use in plate dark slides of the single metal type, the film may be placed with its paper protector in contact with a sheet of thin flat glass and then the edges joined to the glass with narrow strip of thin adhesive tap. If it is preferred to use stiff cardboard in place of glass it is…
Color photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
