FIELD: hidden recording of information for protection of products, goods, original articles against forgery. SUBSTANCE: compound for hidden information recording is based on indicator compound that includes dye or varnish in organic solution and developing composition. Indicator compound has solution A that carries oxidation-reduction indicator chosen from group including diphenylamine, sodium diphenylaminosulfate, phenylantranyl acid and diphenyldenzidine. There is also described procedure of hidden information recording by application of specified indicator compound on substrate. EFFECT: simplified information recording procedure and compound thanks to use of easy to obtain reagents, no need in employment of devices to develop compound. 3 cl, 1 tbl
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