1. IDENTIFICATION OF MICROCARDS CONTAINING CLASSIFIED MATERIAL.
- Author
-
Bowers, Ford W.
- Subjects
MICROCARDS ,DYES & dyeing ,INFORMATION resources ,IMAGE processing ,COLOR ,MICROFORMS ,INFORMATION retrieval - Abstract
The article provides information on the identification of microcards containing classified material. In order to promote security of classified material produced on microcards, such cards should be easily recognized. The simplest man net with which to accomplish this is by having the cards in colors, such as red for secret, yellow for confidential and assigning other colors as necessary. The actual process of coloring the cards can be done with dyes. The dyes should be those having no effect other than coloring on the photographic image, paper stock or gelatin. Some dyes used experimentally were, croisine scarlet and Tintex. The dye was dissolved in hot water to make a highly concentrated solution, then cooled to room temperature and filtered before use.
- Published
- 1954
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