Abstract

Emulsion variations on special-purpose spectrographic plates for detection of ions or invisible radiation greatly complicate use of these plates in quantitative analysis. Indexing by visible light is a useful technique for investigating emulsions, and a convenient apparatus has been constructed for exposing bands of full plate width to light under controlled conditions in such a manner that they do not overlap mass spectral lines. Plates with major emulsion irregularities can be identified by darkroom inspection prior to use, but index bands offer a means of permanent identification of the more important nonuniformities. Indexing techniques are also useful for mass marking, for comparing "in-batch" and "batch-to-batch" variations of plates, and as an aid in evaluating plate characteristics and processing variables.

The Characteristics of Ultraviolet-Sensitized Photographic Plates in the Vacuum Ultraviolet*

Po Lee and G. L. Weissler
J. Opt. Soc. Am. 43(6) 512-515 (1953)

Absolute Sensitivity Measurements on Single-Grain-Layer Photographic Plates for Different Wave-Lengths*

J. H. Webb
J. Opt. Soc. Am. 38(4) 312-323 (1948)

Ultraviolet Sensitization of Photographic Plates with Sodium Salicylate*

Rinda Allison and Jay Burns
J. Opt. Soc. Am. 55(5) 574-575 (1965)

Beaded Plate Recording of Integral Photographs

C. B. Burckhardt and E. T. Doherty
Appl. Opt. 8(11) 2329-2331 (1969)

Conditions for Linearity between Density and Exposure for Photographic Plates

P. J. Vernier
J. Opt. Soc. Am. 59(4) 444-454 (1969)