FIELD: textile industry.
SUBSTANCE: present invention concerns the textile field and more specifically the use of a compound of 4-boron-3a, 4a-diaza-s-indacen family for the production of synthetic fluorescent threads consisting mainly of polymer, where the specified fluorescent compound is integrated into polymer and is selected from compounds having the formula I, where a value of radicals is defined in the claims. Synthetic fluorescent thread, its production method, and the use of threads, in particular, for provision of product protection are also proposed.
EFFECT: invention allows for the production of fluorescent threads, which can be detected at three levels of protection, while threads are easily detected, and they allow for protection of a wide range of products, not only confidential documents and identity documents, but also such products as fabrics.
12 cl, 1 tbl, 2 ex
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