Photographic Indexing Technique for Evaluation of Ion-Sensitive Plates

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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.

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370266774386371

Affiliations: Applied Research Laboratory, United States Steel Corporation, Monroeville, Pennsylvania 15146

Publication date: January 1, 1966

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