| 摘要 |
A method of chemically labeling articles during the course of a theft or robbery and thereby subsequently detecting and identifying both the stolen articles and the thief thereof. A small amount of a latent color reagent having as an active ingredient ninhydrin or hydrindantin or a mixture thereof is discreetly dispensed onto articles in the event of their theft or robbery. Subsequent handling of the articles by the thief causes an indelible stain to form on the hands of the thief approximately twenty minutes after contacting the latent color reagent on the articles. The skin is indelibly stained for twelve to forty-eight hours and the thief is thereby rendered conspicuous. The stolen articles remain intimately contacted with the latent color reagent indefinitely and can be subsequently identified visually by application of a developing solution to produce a characteristic blue-purple stain on the articles.
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