Substance, in particular liquid for producing a usable marking on an object / person, comprising dissolved or contained synthetically produced DNA and quantified additives, such as quantified protective agents and / or dyes and / or optionally metal plates with a size x 1 mm and / or others Additives such as B. quantified mixtures or compounds of organic and / or inorganic substances, for. B. polymers, pheromones, isotopes.
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