Sensitive materials for photographing the far-ultraviolet spectrum usually require either a fluorescent overcoating on the emulsion or a sensitive silver halide layer containing a low concentration of gelatin on the surface. The characteristics of a new photographic material of the latter type are described. Tests indicate that the new emulsion has higher sensitivity, greater contrast, lower fog, and is processed by a simpler procedure than previously available materials. The absorption effect of gelatin is shown.
A. L. SCHOEN and EDWIN S. HODGE, "Photographing Spectra in the Vacuum Ultraviolet," J. Opt. Soc. Am. 40, 23-25 (1950)